diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1eb8c3d..5d1385a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -69,6 +69,13 @@ jobs:
       with:
         name: Build
         path: build
+
+    - name: Composer Up
+      uses: eskatos/gradle-command-action@v1
+      with:
+        gradle-version: 6.8
+        arguments: testSqlComposeUp
+
     - name: TestSql
       uses: eskatos/gradle-command-action@v1
       with:
@@ -81,19 +88,29 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
     - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
         java-version: 11
+
     - uses: actions/download-artifact@v2
       with:
         name: Build
         path: build
+
+    - name: Composer Up
+      uses: eskatos/gradle-command-action@v1
+      with:
+        gradle-version: 6.8
+        arguments: testComposeUp
+
     - name: Test
       uses: eskatos/gradle-command-action@v1
       with:
         gradle-version: 6.8
-        arguments: test -x testSql
+        arguments: test
+
     - name: Coverage
       uses: eskatos/gradle-command-action@v1
       with:
@@ -101,17 +118,28 @@ jobs:
         arguments: coveralls
       env:
         COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+
     - name: Cache SonarCloud packages
       uses: actions/cache@v1
       with:
         path: ~/.sonar/cache
         key: ${{ runner.os }}-sonar
         restore-keys: ${{ runner.os }}-sonar
+
+    - name: Test
+      uses: eskatos/gradle-command-action@v1
+      with:
+        gradle-version: 6.8
+        arguments: test
+
     - name: Build and analyze
+      uses: eskatos/gradle-command-action@v1
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
         SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
-      run: ./gradlew build sonarqube --info
+      with:
+        gradle-version: 6.8
+        arguments: sonarqube --info
 
   lint:
     needs: build
diff --git a/.idea/runConfigurations/Build_without_test.xml b/.idea/runConfigurations/Build_without_test.xml
index 0898a5a..92be20b 100644
--- a/.idea/runConfigurations/Build_without_test.xml
+++ b/.idea/runConfigurations/Build_without_test.xml
@@ -4,7 +4,7 @@
       <option name="executionName" />
       <option name="externalProjectPath" value="$PROJECT_DIR$" />
       <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="-x test -x ktlintKotlinScriptCheck -x ktlintTestSourceSetCheck -x ktlintMainSourceSetCheck" />
+      <option name="scriptParameters" value="-x test -x ktlintKotlinScriptCheck -x ktlintTestSourceSetCheck -x ktlintMainSourceSetCheck -x detekt" />
       <option name="taskDescriptions">
         <list />
       </option>
diff --git a/.idea/runConfigurations/Sonarqube_without_test.xml b/.idea/runConfigurations/Sonarqube__Send_without_run_test_.xml
similarity index 87%
rename from .idea/runConfigurations/Sonarqube_without_test.xml
rename to .idea/runConfigurations/Sonarqube__Send_without_run_test_.xml
index 1774008..b7e8407 100644
--- a/.idea/runConfigurations/Sonarqube_without_test.xml
+++ b/.idea/runConfigurations/Sonarqube__Send_without_run_test_.xml
@@ -1,5 +1,5 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Sonarqube without test" type="GradleRunConfiguration" factoryName="Gradle">
+  <configuration default="false" name="Sonarqube (Send without run test)" type="GradleRunConfiguration" factoryName="Gradle">
     <ExternalSystemSettings>
       <option name="executionName" />
       <option name="externalProjectPath" value="$PROJECT_DIR$" />
diff --git a/.idea/runConfigurations/Test_With_Dependencies.xml b/.idea/runConfigurations/Test_With_Dependencies.xml
new file mode 100644
index 0000000..6540423
--- /dev/null
+++ b/.idea/runConfigurations/Test_With_Dependencies.xml
@@ -0,0 +1,23 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Test With Dependencies" type="GradleRunConfiguration" factoryName="Gradle">
+    <ExternalSystemSettings>
+      <option name="executionName" />
+      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+      <option name="externalSystemIdString" value="GRADLE" />
+      <option name="scriptParameters" value="" />
+      <option name="taskDescriptions">
+        <list />
+      </option>
+      <option name="taskNames">
+        <list>
+          <option value="testWithDependencies" />
+        </list>
+      </option>
+      <option name="vmOptions" value="" />
+    </ExternalSystemSettings>
+    <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
+    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+    <DebugAllEnabled>false</DebugAllEnabled>
+    <method v="2" />
+  </configuration>
+</component>
\ No newline at end of file
diff --git a/README.md b/README.md
index e29db2d..488c3a8 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,5 @@
 # DC Project
 
-[![CodeFactor](https://www.codefactor.io/repository/github/flecomte/dc-project/badge?s=869dc426625a253a07bea95f9380e23fdb048b94)](https://www.codefactor.io/repository/github/flecomte/dc-project)
-[![Codacy Badge](https://app.codacy.com/project/badge/Grade/0ec4fe63370148ca956974f90f8d55be)](https://www.codacy.com/gh/flecomte/dc-project/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=flecomte/dc-project&amp;utm_campaign=Badge_Grade)
 [![Maintainability Rating](https://sonarcloud.io/api/project_badges/measure?project=dc-project&metric=sqale_rating)](https://sonarcloud.io/dashboard?id=dc-project)
 
 [![Tests](https://github.com/flecomte/dc-project/actions/workflows/tests.yml/badge.svg)](https://github.com/flecomte/dc-project/actions/workflows/tests.yml)
diff --git a/build.gradle.kts b/build.gradle.kts
index 6b07044..ce5b4b5 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -94,7 +94,7 @@ val migration by tasks.registering {
 }
 
 val migrationTest by tasks.registering {
-    group = "verification"
+    group = "tests"
     dependsOn(tasks.named("testComposeUp"))
     finalizedBy(tasks.named("testComposeDown"))
     doLast {
@@ -118,11 +118,9 @@ val migrationTest by tasks.registering {
 }
 
 val testSql by tasks.registering {
-    group = "verification"
+    group = "tests"
     dependsOn(tasks.named("processResources"))
     dependsOn(tasks.named("processTestResources"))
-    dependsOn(tasks.named("testSqlComposeUp"))
-    finalizedBy(tasks.named("testSqlComposeDown"))
 
     doLast {
         val config = ConfigFactory.parseFile(file("$buildDir/resources/test/application-test.conf")).resolve()
@@ -183,8 +181,6 @@ tasks.named<ShadowJar>("shadowJar") {
 }
 
 tasks.sonarqube.configure {
-    dependsOn(tasks.test)
-    dependsOn(tasks.detekt)
     dependsOn(tasks.jacocoTestReport)
 }
 
@@ -198,7 +194,6 @@ tasks.test {
     useJUnit()
     useJUnitPlatform()
     systemProperty("junit.jupiter.execution.parallel.enabled", true)
-    dependsOn(testSql)
     finalizedBy(tasks.jacocoTestReport) // report is always generated after tests run
 }
 
@@ -206,13 +201,6 @@ coveralls {
     sourceDirs.add("src/main/kotlin")
 }
 
-tasks.register("testAll") {
-    group = "verification"
-    dependsOn(testSql)
-    dependsOn(tasks.test)
-    dependsOn(tasks.ktlintCheck)
-}
-
 apply(plugin = "docker-compose")
 dockerCompose {
     projectName = "dc-project"
@@ -228,14 +216,12 @@ dockerCompose {
         useComposeFiles = listOf("docker-compose-test.yml")
         startedServices = listOf("db", "elasticsearch")
         stopContainers = false
-        isRequiredBy(project.tasks.named("testSql"))
     }
 
     createNested("test").apply {
         projectName = "dc-project_test"
         useComposeFiles = listOf("docker-compose-test.yml")
         stopContainers = false
-        isRequiredBy(project.tasks.test)
     }
 }
 
@@ -320,6 +306,74 @@ tasks.named("testComposeUp").configure {
     }
 }
 
+tasks.register("testWithDependencies", Test::class) {
+    group = "tests"
+    dependsOn(tasks.named("testComposeUp"))
+    dependsOn(tasks.ktlintCheck)
+    dependsOn(testSql)
+    finalizedBy(tasks.sonarqube) // report is always generated after tests run
+}
+tasks.register("testArticles", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("article")
+    }
+}
+tasks.register("testCitizens", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("citizen")
+    }
+}
+tasks.register("testComments", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("comment")
+    }
+}
+tasks.register("testConstitutions", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("constitution")
+    }
+}
+tasks.register("testFollows", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("follow")
+    }
+}
+tasks.register("testNotifications", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("notification")
+    }
+}
+tasks.register("testOpinions", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("opinion")
+    }
+}
+tasks.register("testVotes", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("vote")
+    }
+}
+tasks.register("testWorkgroups", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("workgroup")
+    }
+}
+tasks.register("testViews", Test::class) {
+    group = "tests"
+    useJUnitPlatform {
+        includeTags("view")
+    }
+}
+
 dependencyCheck {
     formats = listOf(ReportGenerator.Format.HTML, ReportGenerator.Format.XML)
 }
@@ -327,8 +381,9 @@ dependencyCheck {
 repositories {
     mavenLocal()
     jcenter()
-    maven { url = uri("https://kotlin.bintray.com/ktor") }
-    maven { url = uri("https://jitpack.io") }
+    maven("https://kotlin.bintray.com/ktor")
+    maven("https://jitpack.io")
+    maven("https://dl.bintray.com/konform-kt/konform")
 }
 
 dependencies {
@@ -359,6 +414,7 @@ dependencies {
     implementation("org.elasticsearch.client:elasticsearch-rest-client:6.7.1")
     implementation("com.jayway.jsonpath:json-path:2.5.0")
     implementation("com.avast.gradle:gradle-docker-compose-plugin:0.14.0")
+    implementation("io.konform:konform-jvm:0.2.0")
 
     testImplementation("io.ktor:ktor-server-tests:$ktorVersion")
     testImplementation("io.ktor:ktor-client-mock:$ktorVersion")
diff --git a/src/main/kotlin/fr/dcproject/application/Converters.kt b/src/main/kotlin/fr/dcproject/application/Converters.kt
index a88ba3b..4a67f2e 100644
--- a/src/main/kotlin/fr/dcproject/application/Converters.kt
+++ b/src/main/kotlin/fr/dcproject/application/Converters.kt
@@ -1,6 +1,10 @@
 package fr.dcproject.application
 
+import fr.dcproject.application.http.BadRequestException
+import fr.dcproject.application.http.HttpErrorBadRequest
+import fr.dcproject.application.http.HttpErrorBadRequest.InvalidParam
 import io.ktor.features.DataConversion
+import io.ktor.http.HttpStatusCode
 import io.ktor.util.KtorExperimentalAPI
 import org.koin.core.context.GlobalContext
 import org.koin.core.parameter.ParametersDefinition
@@ -8,6 +12,7 @@ import org.koin.core.qualifier.Qualifier
 import java.util.UUID
 
 private typealias ConverterDeclaration = DataConversion.Configuration.() -> Unit
+
 private inline fun <reified T> DataConversion.Configuration.get(
     qualifier: Qualifier? = null,
     noinline parameters: ParametersDefinition? = null
@@ -17,7 +22,21 @@ private inline fun <reified T> DataConversion.Configuration.get(
 val converters: ConverterDeclaration = {
     convert<UUID> {
         decode { values, _ ->
-            values.singleOrNull()?.let { UUID.fromString(it) }
+            try {
+                values.singleOrNull()?.let { UUID.fromString(it) }
+            } catch (e: Throwable) {
+                throw BadRequestException(
+                    HttpErrorBadRequest(
+                        HttpStatusCode.BadRequest,
+                        invalidParams = listOf(
+                            InvalidParam(
+                                "ID",
+                                "must be UUID"
+                            )
+                        )
+                    )
+                )
+            }
         }
 
         encode { value ->
diff --git a/src/main/kotlin/fr/dcproject/application/http/HttpErrorBadRequest.kt b/src/main/kotlin/fr/dcproject/application/http/HttpErrorBadRequest.kt
new file mode 100644
index 0000000..88b4ae5
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/application/http/HttpErrorBadRequest.kt
@@ -0,0 +1,35 @@
+package fr.dcproject.application.http
+
+import fr.dcproject.application.http.HttpErrorBadRequest.InvalidParam
+import io.konform.validation.ValidationResult
+import io.ktor.http.HttpStatusCode
+
+class BadRequestException(val httpError: HttpErrorBadRequest) : Exception()
+
+class HttpErrorBadRequest(
+    statusCode: HttpStatusCode,
+    val title: String = statusCode.description,
+    val invalidParams: List<InvalidParam>,
+) {
+    val statusCode: Int = statusCode.value
+    data class InvalidParam(
+        val name: String,
+        val reason: String
+    )
+}
+
+fun ValidationResult<*>.toOutput() = HttpErrorBadRequest(
+    HttpStatusCode.BadRequest,
+    invalidParams = this.errors.map {
+        InvalidParam(
+            it.dataPath,
+            it.message
+        )
+    }
+)
+
+fun ValidationResult<*>.badRequestIfNotValid() {
+    if (errors.size > 0) {
+        throw BadRequestException(toOutput())
+    }
+}
diff --git a/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt b/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt
index 215add9..d515f24 100644
--- a/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt
+++ b/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt
@@ -6,6 +6,7 @@ import fr.dcproject.component.auth.ForbiddenException
 import fr.dcproject.component.auth.user
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
+import io.ktor.features.ParameterConversionException
 import io.ktor.features.StatusPages
 import io.ktor.http.HttpStatusCode
 import io.ktor.response.respond
@@ -13,18 +14,10 @@ import java.util.concurrent.CompletionException
 
 class HttpError(
     statusCode: HttpStatusCode,
-    val cause: Throwable? = null,
-    val type: String? = null,
+    cause: Throwable? = null,
     val title: String = cause?.message ?: statusCode.description,
-    val detail: String? = null,
-    val invalidParams: List<InvalidParam>? = null,
-    val stackTrace: String? = cause?.stackTraceToString()
 ) {
     val statusCode: Int = statusCode.value
-    data class InvalidParam(
-        val name: String,
-        val reason: String
-    )
 }
 
 fun statusPagesInstallation(): StatusPages.Configuration.() -> Unit = {
@@ -79,4 +72,15 @@ fun statusPagesInstallation(): StatusPages.Configuration.() -> Unit = {
             call.respond(HttpStatusCode.Forbidden, it)
         }
     }
+    exception<BadRequestException> { e ->
+        call.respond(HttpStatusCode.BadRequest, e.httpError)
+    }
+    exception<ParameterConversionException> { e ->
+        val parent = e.cause
+        if (parent is BadRequestException) {
+            call.respond(HttpStatusCode.BadRequest, parent.httpError)
+        } else {
+            throw e
+        }
+    }
 }
diff --git a/src/main/kotlin/fr/dcproject/common/request/PaginatedRequest.kt b/src/main/kotlin/fr/dcproject/common/request/PaginatedRequest.kt
index 063c961..26a307a 100644
--- a/src/main/kotlin/fr/dcproject/common/request/PaginatedRequest.kt
+++ b/src/main/kotlin/fr/dcproject/common/request/PaginatedRequest.kt
@@ -6,9 +6,6 @@ interface PaginatedRequestI {
 }
 
 open class PaginatedRequest(
-    page: Int = 1,
-    limit: Int = 50
-) : PaginatedRequestI {
-    override val page: Int = if (page < 1) 1 else page
-    override val limit: Int = if (limit > 50) 50 else if (limit < 1) 1 else limit
-}
+    override val page: Int = 1,
+    override val limit: Int = 50
+) : PaginatedRequestI
diff --git a/src/main/kotlin/fr/dcproject/common/utils/Elastic.kt b/src/main/kotlin/fr/dcproject/common/utils/Elastic.kt
index b5f98b7..ed71814 100644
--- a/src/main/kotlin/fr/dcproject/common/utils/Elastic.kt
+++ b/src/main/kotlin/fr/dcproject/common/utils/Elastic.kt
@@ -4,7 +4,6 @@ import com.jayway.jsonpath.JsonPath
 import com.jayway.jsonpath.PathNotFoundException
 import org.apache.http.util.EntityUtils
 import org.elasticsearch.client.Response
-import org.slf4j.LoggerFactory
 
 fun Response.contentToString(): String {
     return EntityUtils.toString(this.entity)
@@ -22,8 +21,6 @@ fun String.getJsonField(jsonPath: String): Int? {
     return try {
         JsonPath.read(this, jsonPath)
     } catch (e: PathNotFoundException) {
-        LoggerFactory.getLogger("fr.dcproject.utils.getJsonField")
-            .warn("No value for Json path ${JsonPath.compile(jsonPath).path}")
         null
     }
 }
diff --git a/src/main/kotlin/fr/dcproject/common/utils/retry.kt b/src/main/kotlin/fr/dcproject/common/utils/retry.kt
new file mode 100644
index 0000000..2ccbb93
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/utils/retry.kt
@@ -0,0 +1,41 @@
+package fr.dcproject.common.utils
+
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import kotlin.time.Duration
+import kotlin.time.ExperimentalTime
+
+@ExperimentalTime
+fun <T> retry(numOfRetries: Int, duration: Duration = Duration.ZERO, block: (RetryContext) -> T): T {
+    val logger: Logger = LoggerFactory.getLogger("fr.dcproject.utils.retry")
+    var throwable: Throwable? = null
+    for (attempt in 1..numOfRetries) {
+        val context = RetryContext()
+        try {
+            val output = block(context)
+            if (context.hasStop()) {
+                break
+            }
+            return output
+        } catch (e: Throwable) {
+            throwable = e
+            logger.debug("Failed attempt $attempt / $numOfRetries. Wait ${duration.inSeconds} seconds")
+            Thread.sleep(duration.inMilliseconds.toLong())
+        } finally {
+            if (context.hasStop()) {
+                break
+            }
+        }
+    }
+    throw throwable!!
+}
+
+class RetryContext() {
+    var stoped = false
+
+    fun stop() {
+        stoped = true
+    }
+
+    fun hasStop(): Boolean = stoped
+}
diff --git a/src/main/kotlin/fr/dcproject/common/validation/Email.kt b/src/main/kotlin/fr/dcproject/common/validation/Email.kt
new file mode 100644
index 0000000..32842bb
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/validation/Email.kt
@@ -0,0 +1,6 @@
+package fr.dcproject.common.validation
+
+import io.konform.validation.ValidationBuilder
+import io.konform.validation.jsonschema.pattern
+
+fun ValidationBuilder<String>.email() = pattern(""".+@.+\..+""")
diff --git a/src/main/kotlin/fr/dcproject/common/validation/Password.kt b/src/main/kotlin/fr/dcproject/common/validation/Password.kt
new file mode 100644
index 0000000..718d60b
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/validation/Password.kt
@@ -0,0 +1,22 @@
+package fr.dcproject.common.validation
+
+import io.konform.validation.ValidationBuilder
+
+fun ValidationBuilder<String>.passwordScore(minScore: Int) =
+    addConstraint("is not enough strong. Use Upper case, Lower case and special characters or juste use more characters.") { value ->
+        value.passwordScore() >= minScore
+    }
+
+fun String.passwordScore(): Int {
+    var score: Int = length
+    val alphaNum = ('a'..'z').toList() + ('A'..'Z').toList() + ('0'..'9').toList()
+    val specialCount = length - toList().intersect(alphaNum).size
+    score += specialCount.let { if (it > 3) 3 else it }
+
+    val hasAlphaLower = toList().intersect(('a'..'z').toList()).size.let { if (it > 2) 2 else it }
+    val hasAlphaUpper = toList().intersect(('A'..'Z').toList()).size.let { if (it > 2) 2 else it }
+    val hasNum = toList().intersect(('0'..'9').toList()).size.let { if (it > 2) 2 else it }
+    score += (hasAlphaLower + hasAlphaUpper + hasNum - 2) * 2
+
+    return score
+}
diff --git a/src/main/kotlin/fr/dcproject/common/validation/Url.kt b/src/main/kotlin/fr/dcproject/common/validation/Url.kt
new file mode 100644
index 0000000..320dae2
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/validation/Url.kt
@@ -0,0 +1,15 @@
+package fr.dcproject.common.validation
+
+import io.konform.validation.ValidationBuilder
+import java.net.MalformedURLException
+import java.net.URL
+
+fun ValidationBuilder<String>.isUrl() =
+    addConstraint("is not url") {
+        try {
+            URL(it)
+            true
+        } catch (e: MalformedURLException) {
+            false
+        }
+    }
diff --git a/src/main/kotlin/fr/dcproject/common/validation/Uuid.kt b/src/main/kotlin/fr/dcproject/common/validation/Uuid.kt
new file mode 100644
index 0000000..93708cd
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/validation/Uuid.kt
@@ -0,0 +1,14 @@
+package fr.dcproject.common.validation
+
+import io.konform.validation.ValidationBuilder
+import java.util.UUID
+
+fun ValidationBuilder<String>.isUuid() =
+    addConstraint("must be UUID") {
+        try {
+            UUID.fromString(it)
+            true
+        } catch (exception: IllegalArgumentException) {
+            false
+        }
+    }
diff --git a/src/main/kotlin/fr/dcproject/component/article/routes/FindArticleVersions.kt b/src/main/kotlin/fr/dcproject/component/article/routes/FindArticleVersions.kt
index d9deb0d..83092b3 100644
--- a/src/main/kotlin/fr/dcproject/component/article/routes/FindArticleVersions.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/routes/FindArticleVersions.kt
@@ -1,42 +1,69 @@
 package fr.dcproject.component.article.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
+import fr.dcproject.common.utils.toUUID
+import fr.dcproject.common.validation.isUuid
 import fr.dcproject.component.article.ArticleAccessControl
 import fr.dcproject.component.article.database.ArticleForListing
-import fr.dcproject.component.article.database.ArticleRef
 import fr.dcproject.component.article.database.ArticleRepository
 import fr.dcproject.component.auth.citizenOrNull
+import fr.dcproject.routes.PaginatedRequest
+import fr.dcproject.routes.PaginatedRequestI
 import fr.postgresjson.repository.RepositoryI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.locations.Location
 import io.ktor.locations.get
 import io.ktor.response.respond
 import io.ktor.routing.Route
-import java.util.UUID
 
 @KtorExperimentalLocationsAPI
 object FindArticleVersions {
     @Location("/articles/{article}/versions")
     class ArticleVersionsRequest(
-        article: UUID,
+        val article: String,
         page: Int = 1,
         limit: Int = 50,
         val sort: String? = null,
         val direction: RepositoryI.Direction? = null,
         val search: String? = null
-    ) {
-        val page: Int = if (page < 1) 1 else page
-        val limit: Int = if (limit > 50) 50 else if (limit < 1) 1 else limit
-        val article = ArticleRef(article)
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
+        fun validate() = Validation<ArticleVersionsRequest> {
+            ArticleVersionsRequest::page {
+                minimum(1)
+                maximum(100)
+            }
+            ArticleVersionsRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            ArticleVersionsRequest::sort ifPresent {
+                enum(
+                    "title",
+                    "createdAt",
+                    "vote",
+                    "popularity",
+                )
+            }
+            ArticleVersionsRequest::article {
+                isUuid()
+            }
+        }.validate(this)
     }
 
     private fun ArticleRepository.findVersions(request: ArticleVersionsRequest) =
-        findVersionsById(request.page, request.limit, request.article.id)
+        findVersionsById(request.page, request.limit, request.article.toUUID())
 
     fun Route.findArticleVersions(repo: ArticleRepository, ac: ArticleAccessControl) {
         get<ArticleVersionsRequest> {
+            it.validate().badRequestIfNotValid()
+
             repo.findVersions(it)
                 .apply { ac.assert { canView(result, citizenOrNull) } }
                 .run {
diff --git a/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt b/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt
index b0b5abd..44d930d 100644
--- a/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt
@@ -1,7 +1,9 @@
 package fr.dcproject.component.article.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
+import fr.dcproject.common.validation.isUuid
 import fr.dcproject.component.article.ArticleAccessControl
 import fr.dcproject.component.article.database.ArticleForListing
 import fr.dcproject.component.article.database.ArticleRepository
@@ -10,6 +12,10 @@ import fr.dcproject.routes.PaginatedRequest
 import fr.dcproject.routes.PaginatedRequestI
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.repository.RepositoryI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.locations.Location
@@ -28,7 +34,31 @@ object FindArticles {
         val search: String? = null,
         val createdBy: String? = null,
         val workgroup: String? = null
-    ) : PaginatedRequestI by PaginatedRequest(page, limit)
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
+        fun validate() = Validation<ArticlesRequest> {
+            ArticlesRequest::page {
+                minimum(1)
+            }
+            ArticlesRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            ArticlesRequest::sort ifPresent {
+                enum(
+                    "title",
+                    "createdAt",
+                    "vote",
+                    "popularity",
+                )
+            }
+            ArticlesRequest::createdBy ifPresent {
+                isUuid()
+            }
+            ArticlesRequest::workgroup ifPresent {
+                isUuid()
+            }
+        }.validate(this)
+    }
 
     private fun ArticleRepository.findArticles(request: ArticlesRequest): Paginated<ArticleForListing> {
         return find(
@@ -43,6 +73,8 @@ object FindArticles {
 
     fun Route.findArticles(repo: ArticleRepository, ac: ArticleAccessControl) {
         get<ArticlesRequest> {
+            it.validate().badRequestIfNotValid()
+
             repo.findArticles(it)
                 .apply { ac.assert { canView(result, citizenOrNull) } }
                 .let {
diff --git a/src/main/kotlin/fr/dcproject/component/article/routes/UpsertArticle.kt b/src/main/kotlin/fr/dcproject/component/article/routes/UpsertArticle.kt
index 20beaef..57fce8a 100644
--- a/src/main/kotlin/fr/dcproject/component/article/routes/UpsertArticle.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/routes/UpsertArticle.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.article.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.article.ArticleAccessControl
@@ -12,6 +13,11 @@ import fr.dcproject.component.auth.mustBeAuth
 import fr.dcproject.component.notification.ArticleUpdateNotification
 import fr.dcproject.component.notification.Publisher
 import fr.dcproject.component.workgroup.database.WorkgroupRef
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxItems
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minItems
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -35,11 +41,31 @@ object UpsertArticle {
             val draft: Boolean = false,
             val versionId: UUID,
             val workgroup: WorkgroupRef? = null,
-        )
+        ) {
+            fun validate() = Validation<Input> {
+                Input::title {
+                    minLength(5)
+                    maxLength(80)
+                }
+                Input::content {
+                    minLength(50)
+                    maxLength(6000)
+                }
+                Input::description {
+                    minLength(50)
+                    maxLength(6000)
+                }
+                Input::tags {
+                    minItems(0)
+                    maxItems(15)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.upsertArticle(repo: ArticleRepository, publisher: Publisher, ac: ArticleAccessControl) {
         suspend fun ApplicationCall.convertRequestToEntity(): ArticleForUpdate = receiveOrBadRequest<Input>().run {
+            validate().badRequestIfNotValid()
             ArticleForUpdate(
                 id = id ?: UUID.randomUUID(),
                 title = title,
diff --git a/src/main/kotlin/fr/dcproject/component/auth/routes/Register.kt b/src/main/kotlin/fr/dcproject/component/auth/routes/Register.kt
index 08d1d67..0daa29a 100644
--- a/src/main/kotlin/fr/dcproject/component/auth/routes/Register.kt
+++ b/src/main/kotlin/fr/dcproject/component/auth/routes/Register.kt
@@ -1,7 +1,10 @@
 package fr.dcproject.component.auth.routes
 
 import com.fasterxml.jackson.module.kotlin.MissingKotlinParameterException
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.utils.receiveOrBadRequest
+import fr.dcproject.common.validation.email
+import fr.dcproject.common.validation.passwordScore
 import fr.dcproject.component.auth.database.UserForCreate
 import fr.dcproject.component.auth.database.UserI
 import fr.dcproject.component.auth.jwt.makeToken
@@ -9,6 +12,9 @@ import fr.dcproject.component.auth.routes.Register.RegisterRequest.Input
 import fr.dcproject.component.citizen.database.CitizenForCreate
 import fr.dcproject.component.citizen.database.CitizenI
 import fr.dcproject.component.citizen.database.CitizenRepository
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.features.BadRequestException
 import io.ktor.http.ContentType
@@ -43,6 +49,35 @@ object Register {
                 val username: String,
                 val password: String
             )
+
+            fun validate() = Validation<Input> {
+                Input::name {
+                    Name::firstName {
+                        minLength(2)
+                        maxLength(50)
+                    }
+                    Name::lastName {
+                        minLength(2)
+                        maxLength(50)
+                    }
+                    Name::civility ifPresent {
+                        minLength(1)
+                        maxLength(10)
+                    }
+                }
+                Input::user {
+                    User::username {
+                        minLength(7)
+                        maxLength(30)
+                    }
+                    User::password {
+                        passwordScore(15)
+                    }
+                }
+                Input::email {
+                    email()
+                }
+            }.validate(this)
         }
     }
 
@@ -62,7 +97,10 @@ object Register {
 
         post<RegisterRequest> {
             try {
-                val citizen = call.receiveOrBadRequest<Input>().toCitizen()
+                val citizen = call.receiveOrBadRequest<Input>()
+                    .apply { validate().badRequestIfNotValid() }
+                    .toCitizen()
+
                 citizenRepo.insertWithUser(citizen)?.user?.makeToken()?.let { token ->
                     if (call.request.accept() == ContentType.Application.Json.toString()) {
                         call.respond(
diff --git a/src/main/kotlin/fr/dcproject/component/citizen/routes/ChangeMyPassword.kt b/src/main/kotlin/fr/dcproject/component/citizen/routes/ChangeMyPassword.kt
index 6a360de..cca3586 100644
--- a/src/main/kotlin/fr/dcproject/component/citizen/routes/ChangeMyPassword.kt
+++ b/src/main/kotlin/fr/dcproject/component/citizen/routes/ChangeMyPassword.kt
@@ -1,7 +1,9 @@
 package fr.dcproject.component.citizen.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
+import fr.dcproject.common.validation.passwordScore
 import fr.dcproject.component.auth.citizen
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.auth.database.UserRepository
@@ -9,6 +11,7 @@ import fr.dcproject.component.auth.database.UserWithPassword
 import fr.dcproject.component.auth.mustBeAuth
 import fr.dcproject.component.citizen.CitizenAccessControl
 import fr.dcproject.component.citizen.database.CitizenRef
+import io.konform.validation.Validation
 import io.ktor.application.call
 import io.ktor.auth.UserPasswordCredential
 import io.ktor.features.BadRequestException
@@ -25,14 +28,21 @@ object ChangeMyPassword {
     @Location("/citizens/{citizen}/password/change")
     class ChangePasswordCitizenRequest(citizen: UUID) {
         val citizen = CitizenRef(citizen)
-        data class Input(val oldPassword: String, val newPassword: String)
+        data class Input(val oldPassword: String, val newPassword: String) {
+            fun validate() = Validation<Input> {
+                Input::newPassword {
+                    passwordScore(15)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.changeMyPassword(ac: CitizenAccessControl, userRepository: UserRepository) {
         put<ChangePasswordCitizenRequest> {
             mustBeAuth()
-            ac.assert { canChangePassword(it.citizen, citizenOrNull) }
             val content = call.receiveOrBadRequest<ChangePasswordCitizenRequest.Input>()
+                .apply { validate().badRequestIfNotValid() }
+            ac.assert { canChangePassword(it.citizen, citizenOrNull) }
             userRepository.findByCredentials(UserPasswordCredential(citizen.user.username, content.oldPassword)) ?: throw BadRequestException("Bad Password")
             userRepository.changePassword(
                 UserWithPassword(
diff --git a/src/main/kotlin/fr/dcproject/component/citizen/routes/FindCitizens.kt b/src/main/kotlin/fr/dcproject/component/citizen/routes/FindCitizens.kt
index 6ca46f2..872c090 100644
--- a/src/main/kotlin/fr/dcproject/component/citizen/routes/FindCitizens.kt
+++ b/src/main/kotlin/fr/dcproject/component/citizen/routes/FindCitizens.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.citizen.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.component.auth.citizenOrNull
@@ -10,6 +11,10 @@ import fr.dcproject.component.citizen.database.CitizenRepository
 import fr.dcproject.routes.PaginatedRequest
 import fr.dcproject.routes.PaginatedRequestI
 import fr.postgresjson.repository.RepositoryI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.locations.Location
@@ -27,11 +32,28 @@ object FindCitizens {
         val sort: String? = null,
         val direction: RepositoryI.Direction? = null,
         val search: String? = null
-    ) : PaginatedRequestI by PaginatedRequest(page, limit)
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
+        fun validate() = Validation<CitizensRequest> {
+            CitizensRequest::page {
+                minimum(1)
+            }
+            CitizensRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            CitizensRequest::sort ifPresent {
+                enum(
+                    "title",
+                    "createdAt",
+                )
+            }
+        }.validate(this)
+    }
 
     fun Route.findCitizen(ac: CitizenAccessControl, repo: CitizenRepository) {
         get<CitizensRequest> {
             mustBeAuth()
+            it.validate().badRequestIfNotValid()
             val citizens = repo.find(it.page, it.limit, it.sort, it.direction, it.search)
             ac.assert { canView(citizens.result, citizenOrNull) }
             call.respond(
diff --git a/src/main/kotlin/fr/dcproject/component/comment/article/database/CommentArticleRepository.kt b/src/main/kotlin/fr/dcproject/component/comment/article/database/CommentArticleRepository.kt
index 4c7f1a4..a659e87 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/article/database/CommentArticleRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/article/database/CommentArticleRepository.kt
@@ -41,7 +41,7 @@ class CommentArticleRepository(requester: Requester) : CommentRepositoryAbs<Arti
         target: EntityI,
         page: Int,
         limit: Int,
-        sort: Sort
+        sort: String
     ): Paginated<CommentForView<ArticleForView, CitizenCreatorI>> {
         return requester
             .getFunction("find_comments_by_target")
@@ -49,18 +49,7 @@ class CommentArticleRepository(requester: Requester) : CommentRepositoryAbs<Arti
                 page,
                 limit,
                 "target_id" to target.id,
-                "sort" to sort.sql
+                "sort" to sort
             ) as Paginated<CommentForView<ArticleForView, CitizenCreatorI>>
     }
-
-    enum class Sort(val sql: String) {
-        CREATED_AT("created_at"),
-        VOTES("votes");
-
-        companion object {
-            fun fromString(string: String): Sort? {
-                return values().firstOrNull { it.sql == string }
-            }
-        }
-    }
 }
diff --git a/src/main/kotlin/fr/dcproject/component/comment/article/routes/CreateCommentArticle.kt b/src/main/kotlin/fr/dcproject/component/comment/article/routes/CreateCommentArticle.kt
index fd10799..493f9aa 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/article/routes/CreateCommentArticle.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/article/routes/CreateCommentArticle.kt
@@ -1,6 +1,6 @@
 package fr.dcproject.component.comment.article.routes
 
-import fr.dcproject.common.response.toOutput
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.article.database.ArticleRef
@@ -12,6 +12,9 @@ import fr.dcproject.component.comment.article.routes.CreateCommentArticle.PostAr
 import fr.dcproject.component.comment.generic.CommentAccessControl
 import fr.dcproject.component.comment.generic.database.CommentForUpdate
 import fr.dcproject.component.comment.toOutput
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -26,27 +29,36 @@ object CreateCommentArticle {
     @Location("/articles/{article}/comments")
     class PostArticleCommentRequest(article: UUID) {
         val article = ArticleRef(article)
-        class Input(val content: String)
+        class Input(val content: String) {
+            fun validate() = Validation<Input> {
+                Input::content {
+                    minLength(20)
+                    maxLength(6000)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.createCommentArticle(repo: CommentArticleRepository, ac: CommentAccessControl) {
         post<PostArticleCommentRequest> {
             mustBeAuth()
-            call.receiveOrBadRequest<Input>().run {
-                CommentForUpdate(
-                    target = it.article,
-                    createdBy = citizen,
-                    content = content
-                )
-            }.let { comment ->
-                ac.assert { canCreate(comment, citizenOrNull) }
-                repo.comment(comment)
+            call.receiveOrBadRequest<Input>()
+                .apply { validate().badRequestIfNotValid() }
+                .run {
+                    CommentForUpdate(
+                        target = it.article,
+                        createdBy = citizen,
+                        content = content
+                    )
+                }.let { comment ->
+                    ac.assert { canCreate(comment, citizenOrNull) }
+                    repo.comment(comment)
 
-                call.respond(
-                    HttpStatusCode.Created,
-                    comment.toOutput()
-                )
-            }
+                    call.respond(
+                        HttpStatusCode.Created,
+                        comment.toOutput()
+                    )
+                }
         }
     }
 }
diff --git a/src/main/kotlin/fr/dcproject/component/comment/article/routes/GetArticleComments.kt b/src/main/kotlin/fr/dcproject/component/comment/article/routes/GetArticleComments.kt
index 896cad6..3ec2e88 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/article/routes/GetArticleComments.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/article/routes/GetArticleComments.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.comment.article.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.component.article.database.ArticleRef
@@ -9,6 +10,10 @@ import fr.dcproject.component.comment.generic.CommentAccessControl
 import fr.dcproject.component.comment.toOutput
 import fr.dcproject.routes.PaginatedRequest
 import fr.dcproject.routes.PaginatedRequestI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -26,14 +31,31 @@ object GetArticleComments {
         page: Int = 1,
         limit: Int = 50,
         val search: String? = null,
-        sort: String = CommentArticleRepository.Sort.CREATED_AT.sql
+        val sort: String = "createdAt"
     ) : PaginatedRequestI by PaginatedRequest(page, limit) {
         val article = ArticleRef(article)
-        val sort: CommentArticleRepository.Sort = CommentArticleRepository.Sort.fromString(sort) ?: CommentArticleRepository.Sort.CREATED_AT
+
+        fun validate() = Validation<ArticleCommentsRequest> {
+            ArticleCommentsRequest::page {
+                minimum(1)
+            }
+            ArticleCommentsRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            ArticleCommentsRequest::sort ifPresent {
+                enum(
+                    "votes",
+                    "createdAt",
+                )
+            }
+        }.validate(this)
     }
 
     fun Route.getArticleComments(repo: CommentArticleRepository, ac: CommentAccessControl) {
         get<ArticleCommentsRequest> {
+            it.validate().badRequestIfNotValid()
+
             val comments = repo.findByTarget(it.article, it.page, it.limit, it.sort)
             if (comments.result.isNotEmpty()) {
                 ac.assert { canView(comments.result, citizenOrNull) }
diff --git a/src/main/kotlin/fr/dcproject/component/comment/constitution/database/CommentConstitutionRepository.kt b/src/main/kotlin/fr/dcproject/component/comment/constitution/database/CommentConstitutionRepository.kt
index e0d03fa..2b48c0c 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/constitution/database/CommentConstitutionRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/constitution/database/CommentConstitutionRepository.kt
@@ -5,7 +5,6 @@ import fr.dcproject.common.entity.TargetI
 import fr.dcproject.component.citizen.database.CitizenCreator
 import fr.dcproject.component.citizen.database.CitizenCreatorI
 import fr.dcproject.component.citizen.database.CitizenI
-import fr.dcproject.component.comment.article.database.CommentArticleRepository
 import fr.dcproject.component.comment.generic.database.CommentForView
 import fr.dcproject.component.comment.generic.database.CommentRepositoryAbs
 import fr.dcproject.component.constitution.database.ConstitutionRef
@@ -41,7 +40,7 @@ class CommentConstitutionRepository(requester: Requester) : CommentRepositoryAbs
         target: EntityI,
         page: Int,
         limit: Int,
-        sort: CommentArticleRepository.Sort
+        sort: String
     ): Paginated<CommentForView<ConstitutionRef, CitizenCreatorI>> {
         return requester.run {
             getFunction("find_comments_by_target")
@@ -49,7 +48,7 @@ class CommentConstitutionRepository(requester: Requester) : CommentRepositoryAbs
                     page,
                     limit,
                     "target_id" to target.id,
-                    "sort" to sort.sql
+                    "sort" to sort
                 )
                 as Paginated<CommentForView<ConstitutionRef, CitizenCreatorI>>
         }
diff --git a/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/CreateConstitutionComment.kt b/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/CreateConstitutionComment.kt
index cf368e4..0b700f0 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/CreateConstitutionComment.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/CreateConstitutionComment.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.comment.constitution.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
@@ -12,6 +13,9 @@ import fr.dcproject.component.comment.generic.CommentAccessControl
 import fr.dcproject.component.comment.generic.database.CommentForUpdate
 import fr.dcproject.component.comment.toOutput
 import fr.dcproject.component.constitution.database.ConstitutionRef
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -26,27 +30,37 @@ object CreateConstitutionComment {
     @Location("/constitutions/{constitution}/comments")
     class CreateConstitutionCommentRequest(constitution: UUID) {
         val constitution = ConstitutionRef(constitution)
-        class Input(val content: String)
+        class Input(val content: String) {
+            fun validate() = Validation<Input> {
+                Input::content {
+                    minLength(20)
+                    maxLength(6000)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.createConstitutionComment(repo: CommentConstitutionRepository, ac: CommentAccessControl) {
         post<CreateConstitutionCommentRequest> {
             mustBeAuth()
-            call.receiveOrBadRequest<Input>().run {
-                CommentForUpdate(
-                    target = it.constitution,
-                    createdBy = citizen,
-                    content = content
-                )
-            }.let { comment ->
-                ac.assert { canCreate(comment, citizenOrNull) }
-                repo.comment(comment)
 
-                call.respond(
-                    HttpStatusCode.Created,
-                    comment.toOutput()
-                )
-            }
+            call.receiveOrBadRequest<Input>()
+                .apply { validate().badRequestIfNotValid() }
+                .run {
+                    CommentForUpdate(
+                        target = it.constitution,
+                        createdBy = citizen,
+                        content = content
+                    )
+                }.let { comment ->
+                    ac.assert { canCreate(comment, citizenOrNull) }
+                    repo.comment(comment)
+
+                    call.respond(
+                        HttpStatusCode.Created,
+                        comment.toOutput()
+                    )
+                }
         }
     }
 }
diff --git a/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/GetConstitutionComment.kt b/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/GetConstitutionComment.kt
index 40ae7ef..47d417e 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/GetConstitutionComment.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/constitution/routes/GetConstitutionComment.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.comment.constitution.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.component.auth.citizenOrNull
@@ -7,6 +8,12 @@ import fr.dcproject.component.comment.constitution.database.CommentConstitutionR
 import fr.dcproject.component.comment.generic.CommentAccessControl
 import fr.dcproject.component.comment.toOutput
 import fr.dcproject.component.constitution.database.ConstitutionRef
+import fr.dcproject.routes.PaginatedRequest
+import fr.dcproject.routes.PaginatedRequestI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -19,12 +26,36 @@ import java.util.UUID
 @KtorExperimentalLocationsAPI
 object GetConstitutionComment {
     @Location("/constitutions/{constitution}/comments")
-    class GetConstitutionCommentRequest(constitution: UUID) {
+    class GetConstitutionCommentRequest(
+        constitution: UUID,
+        page: Int = 1,
+        limit: Int = 50,
+        val search: String? = null,
+        val sort: String = "createdAt"
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
         val constitution = ConstitutionRef(constitution)
+
+        fun validate() = Validation<GetConstitutionCommentRequest> {
+            GetConstitutionCommentRequest::page {
+                minimum(1)
+            }
+            GetConstitutionCommentRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            GetConstitutionCommentRequest::sort ifPresent {
+                enum(
+                    "votes",
+                    "createdAt",
+                )
+            }
+        }.validate(this)
     }
 
     fun Route.getConstitutionComment(repo: CommentConstitutionRepository, ac: CommentAccessControl) {
         get<GetConstitutionCommentRequest> {
+            it.validate().badRequestIfNotValid()
+
             val comments = repo.findByTarget(it.constitution)
             ac.assert { canView(comments.result, citizenOrNull) }
             call.respond(
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/database/Comment.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/database/Comment.kt
index e18cdf6..fdb95f0 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/database/Comment.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/database/Comment.kt
@@ -63,12 +63,14 @@ open class CommentForUpdate<T : TargetI, C : CitizenI>(
     constructor(
         createdBy: C,
         parent: CommentParent<T>,
-        content: String
+        content: String,
+        id: UUID? = null,
     ) : this(
         createdBy = createdBy,
         parent = parent,
         target = parent.target,
-        content = content
+        content = content,
+        id = id ?: UUID.randomUUID(),
     )
 }
 
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/database/CommentRepository.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/database/CommentRepository.kt
index 8cf12c7..8a86a7b 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/database/CommentRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/database/CommentRepository.kt
@@ -6,7 +6,6 @@ import fr.dcproject.common.entity.TargetRef
 import fr.dcproject.component.citizen.database.CitizenCreator
 import fr.dcproject.component.citizen.database.CitizenCreatorI
 import fr.dcproject.component.citizen.database.CitizenI
-import fr.dcproject.component.comment.article.database.CommentArticleRepository
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.connexion.Requester
 import fr.postgresjson.repository.RepositoryI
@@ -22,7 +21,7 @@ abstract class CommentRepositoryAbs<T : TargetI>(override var requester: Request
     ): Paginated<CommentForView<T, CitizenCreatorI>>
 
     open fun findByParent(
-        parent: CommentForView<T, CitizenCreatorI>,
+        parent: CommentI,
         page: Int = 1,
         limit: Int = 50
     ): Paginated<CommentForView<T, CitizenCreatorI>> {
@@ -49,7 +48,7 @@ abstract class CommentRepositoryAbs<T : TargetI>(override var requester: Request
         target: EntityI,
         page: Int = 1,
         limit: Int = 50,
-        sort: CommentArticleRepository.Sort = CommentArticleRepository.Sort.CREATED_AT
+        sort: String = "createdAt"
     ): Paginated<CommentForView<T, CitizenCreatorI>> {
         return findByTarget(target.id, page, limit, sort)
     }
@@ -58,36 +57,30 @@ abstract class CommentRepositoryAbs<T : TargetI>(override var requester: Request
         targetId: UUID,
         page: Int = 1,
         limit: Int = 50,
-        sort: CommentArticleRepository.Sort = CommentArticleRepository.Sort.CREATED_AT
-    ): Paginated<CommentForView<T, CitizenCreatorI>> {
-        return requester.run {
-            getFunction("find_comments_by_target")
-                .select<CommentForView<T, CitizenCreator>>(
-                    page,
-                    limit,
-                    "target_id" to targetId,
-                    "sort" to sort.sql
-                )
-                as Paginated<CommentForView<T, CitizenCreatorI>>
-        }
-    }
+        sort: String = "createdAt"
+    ): Paginated<CommentForView<T, CitizenCreatorI>> = requester
+        .getFunction("find_comments_by_target")
+        .select<CommentForView<T, CitizenCreator>>(
+            page,
+            limit,
+            "target_id" to targetId,
+            "sort" to sort
+        ) as Paginated<CommentForView<T, CitizenCreatorI>>
 
-    fun <I : TargetI, C : CitizenCreatorI> comment(comment: CommentForUpdate<I, C>) {
-        requester
-            .getFunction("comment")
-            .sendQuery(
-                "reference" to comment.target.reference,
-                "resource" to comment
-            )
-    }
+    fun <I : TargetI, C : CitizenCreatorI> comment(comment: CommentForUpdate<I, C>): CommentForView<TargetRef, CitizenCreator> = requester
+        .getFunction("comment")
+        .selectOne(
+            "reference" to comment.target.reference,
+            "resource" to comment
+        )!!
 
-    fun <I : T> edit(comment: CommentForUpdate<I, CitizenCreatorI>) {
-        requester
+    fun <I : T> edit(comment: CommentForUpdate<I, CitizenCreatorI>): CommentForView<TargetRef, CitizenCreator> {
+        return requester
             .getFunction("edit_comment")
-            .sendQuery(
+            .selectOne(
                 "id" to comment.id,
                 "content" to comment.content
-            )
+            )!!
     }
 }
 
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/CreateComment.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/CreateComment.kt
new file mode 100644
index 0000000..6158794
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/CreateComment.kt
@@ -0,0 +1,63 @@
+package fr.dcproject.component.comment.generic.routes
+
+import fr.dcproject.application.http.badRequestIfNotValid
+import fr.dcproject.common.security.assert
+import fr.dcproject.common.utils.receiveOrBadRequest
+import fr.dcproject.component.auth.citizen
+import fr.dcproject.component.auth.citizenOrNull
+import fr.dcproject.component.auth.mustBeAuth
+import fr.dcproject.component.comment.generic.CommentAccessControl
+import fr.dcproject.component.comment.generic.database.CommentForUpdate
+import fr.dcproject.component.comment.generic.database.CommentRef
+import fr.dcproject.component.comment.generic.database.CommentRepository
+import fr.dcproject.component.comment.toOutput
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
+import io.ktor.application.call
+import io.ktor.features.NotFoundException
+import io.ktor.http.HttpStatusCode
+import io.ktor.locations.KtorExperimentalLocationsAPI
+import io.ktor.locations.Location
+import io.ktor.locations.post
+import io.ktor.response.respond
+import io.ktor.routing.Route
+import java.util.UUID
+
+@KtorExperimentalLocationsAPI
+object CreateComment {
+    @Location("/comments/{comment}")
+    class CreateCommentRequest(comment: UUID) {
+        val comment = CommentRef(comment)
+        class Input(val content: String) {
+            fun validate() = Validation<Input> {
+                Input::content {
+                    minLength(20)
+                    maxLength(6000)
+                }
+            }.validate(this)
+        }
+    }
+
+    fun Route.createCommentChildren(repo: CommentRepository, ac: CommentAccessControl) {
+        post<CreateCommentRequest> {
+            mustBeAuth()
+
+            call.receiveOrBadRequest<CreateCommentRequest.Input>()
+                .apply { validate().badRequestIfNotValid() }
+                .run {
+                    val parent = repo.findById(it.comment.id) ?: throw NotFoundException("Comment not found")
+                    CommentForUpdate(
+                        content = content,
+                        createdBy = citizen,
+                        target = parent.target,
+                        parent = parent,
+                    )
+                }.let { newComment ->
+                    ac.assert { canCreate(newComment, citizenOrNull) }
+                    repo.comment(newComment)
+                    call.respond(HttpStatusCode.Created, newComment.toOutput())
+                }
+        }
+    }
+}
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/CreateCommentChildren.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/CreateCommentChildren.kt
deleted file mode 100644
index b95d2cd..0000000
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/CreateCommentChildren.kt
+++ /dev/null
@@ -1,47 +0,0 @@
-package fr.dcproject.component.comment.generic.routes
-
-import fr.dcproject.common.security.assert
-import fr.dcproject.common.utils.receiveOrBadRequest
-import fr.dcproject.component.auth.citizen
-import fr.dcproject.component.auth.citizenOrNull
-import fr.dcproject.component.auth.mustBeAuth
-import fr.dcproject.component.comment.generic.CommentAccessControl
-import fr.dcproject.component.comment.generic.database.CommentForUpdate
-import fr.dcproject.component.comment.generic.database.CommentRef
-import fr.dcproject.component.comment.generic.database.CommentRepository
-import fr.dcproject.component.comment.toOutput
-import io.ktor.application.call
-import io.ktor.features.NotFoundException
-import io.ktor.http.HttpStatusCode
-import io.ktor.locations.KtorExperimentalLocationsAPI
-import io.ktor.locations.Location
-import io.ktor.locations.post
-import io.ktor.response.respond
-import io.ktor.routing.Route
-import java.util.UUID
-
-@KtorExperimentalLocationsAPI
-object CreateCommentChildren {
-    @Location("/comments/{comment}/children")
-    class CreateCommentChildrenRequest(comment: UUID) {
-        val comment = CommentRef(comment)
-        class Input(val content: String)
-    }
-
-    fun Route.createCommentChildren(repo: CommentRepository, ac: CommentAccessControl) {
-        post<CreateCommentChildrenRequest> {
-            mustBeAuth()
-            val parent = repo.findById(it.comment.id) ?: throw NotFoundException("Comment not found")
-            val newComment = CommentForUpdate(
-                content = call.receiveOrBadRequest<CreateCommentChildrenRequest.Input>().content,
-                createdBy = citizen,
-                parent = parent
-            )
-
-            ac.assert { canCreate(newComment, citizenOrNull) }
-            repo.comment(newComment)
-
-            call.respond(HttpStatusCode.Created, newComment.toOutput())
-        }
-    }
-}
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/EditComment.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/EditComment.kt
index 7aa20c0..b4e1522 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/EditComment.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/EditComment.kt
@@ -1,14 +1,18 @@
 package fr.dcproject.component.comment.generic.routes
 
-import fr.dcproject.common.response.toOutput
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.auth.mustBeAuth
 import fr.dcproject.component.comment.generic.CommentAccessControl
+import fr.dcproject.component.comment.generic.database.CommentForUpdate
 import fr.dcproject.component.comment.generic.database.CommentRef
 import fr.dcproject.component.comment.generic.database.CommentRepository
 import fr.dcproject.component.comment.toOutput
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
@@ -24,22 +28,40 @@ object EditComment {
     @Location("/comments/{comment}")
     class EditCommentRequest(comment: UUID) {
         val comment = CommentRef(comment)
-        class Input(val content: String)
+        class Input(val content: String) {
+            fun validate() = Validation<Input> {
+                Input::content {
+                    minLength(20)
+                    maxLength(6000)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.editComment(repo: CommentRepository, ac: CommentAccessControl) {
         put<EditCommentRequest> {
             mustBeAuth()
-            val comment = repo.findById(it.comment.id) ?: throw NotFoundException("Comment not found")
-            ac.assert { canUpdate(comment, citizenOrNull) }
+            val commentOld = repo.findById(it.comment.id) ?: throw NotFoundException("Comment not found")
+            ac.assert { canUpdate(commentOld, citizenOrNull) }
 
-            comment.content = call.receiveOrBadRequest<EditCommentRequest.Input>().content
-            repo.edit(comment)
-
-            call.respond(
-                HttpStatusCode.OK,
-                comment.toOutput()
-            )
+            call.receiveOrBadRequest<EditCommentRequest.Input>()
+                .apply { validate().badRequestIfNotValid() }
+                .run {
+                    CommentForUpdate(
+                        id = commentOld.id,
+                        createdBy = commentOld.createdBy,
+                        target = commentOld.target,
+                        parent = commentOld.parent,
+                        content = content,
+                    )
+                }
+                .let { repo.edit(it) }
+                .let {
+                    call.respond(
+                        HttpStatusCode.OK,
+                        it.toOutput()
+                    )
+                }
         }
     }
 }
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/GetCommentChildren.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/GetCommentChildren.kt
index 52d1c1e..a478f0d 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/GetCommentChildren.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/GetCommentChildren.kt
@@ -4,6 +4,7 @@ import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.comment.generic.CommentAccessControl
+import fr.dcproject.component.comment.generic.database.CommentRef
 import fr.dcproject.component.comment.generic.database.CommentRepository
 import fr.dcproject.component.comment.toOutput
 import fr.dcproject.routes.PaginatedRequest
@@ -21,11 +22,13 @@ import java.util.UUID
 object GetCommentChildren {
     @Location("/comments/{comment}/children")
     class CommentChildrenRequest(
-        val comment: UUID,
+        comment: UUID,
         page: Int = 1,
         limit: Int = 50,
         val search: String? = null
-    ) : PaginatedRequestI by PaginatedRequest(page, limit)
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
+        val comment = CommentRef(comment)
+    }
 
     fun Route.getChildrenComments(repo: CommentRepository, ac: CommentAccessControl) {
         get<CommentChildrenRequest> {
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/install.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/install.kt
index 8ea983c..3ca3711 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/routes/install.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/routes/install.kt
@@ -1,6 +1,6 @@
 package fr.dcproject.component.comment.generic.routes
 
-import fr.dcproject.component.comment.generic.routes.CreateCommentChildren.createCommentChildren
+import fr.dcproject.component.comment.generic.routes.CreateComment.createCommentChildren
 import fr.dcproject.component.comment.generic.routes.EditComment.editComment
 import fr.dcproject.component.comment.generic.routes.GetCommentChildren.getChildrenComments
 import fr.dcproject.component.comment.generic.routes.GetOneComment.getOneComment
diff --git a/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt b/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt
index dfc69d0..cb4e11f 100644
--- a/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt
+++ b/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.constitution.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
@@ -15,6 +16,9 @@ import fr.dcproject.component.constitution.database.ConstitutionForUpdate.TitleF
 import fr.dcproject.component.constitution.database.ConstitutionRepository
 import fr.dcproject.component.constitution.routes.CreateConstitution.PostConstitutionRequest.Input
 import fr.dcproject.component.constitution.routes.CreateConstitution.PostConstitutionRequest.Input.Title
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -36,7 +40,6 @@ object CreateConstitution {
             val draft: Boolean = false,
             val versionId: UUID = UUID.randomUUID()
         ) {
-
             class Title(
                 val id: UUID = UUID.randomUUID(),
                 val name: String,
@@ -44,10 +47,25 @@ object CreateConstitution {
             ) {
                 class ArticleRef(val id: UUID)
             }
+
+            fun validate() = Validation<Input> {
+                Input::title {
+                    minLength(10)
+                    maxLength(80)
+                }
+                Input::titles onEach {
+                    Title::name {
+                        minLength(10)
+                        maxLength(80)
+                    }
+                }
+            }.validate(this)
         }
     }
 
     private fun getNewConstitution(input: Input, citizen: Citizen) = input.run {
+        validate().badRequestIfNotValid()
+
         ConstitutionForUpdate<CitizenWithUserI, TitleForUpdate<ArticleRef>>(
             id = UUID.randomUUID(),
             title = title,
diff --git a/src/main/kotlin/fr/dcproject/component/constitution/routes/FindConstitutions.kt b/src/main/kotlin/fr/dcproject/component/constitution/routes/FindConstitutions.kt
index f7184f2..c570753 100644
--- a/src/main/kotlin/fr/dcproject/component/constitution/routes/FindConstitutions.kt
+++ b/src/main/kotlin/fr/dcproject/component/constitution/routes/FindConstitutions.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.constitution.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.component.auth.citizenOrNull
@@ -8,6 +9,10 @@ import fr.dcproject.component.constitution.database.ConstitutionRepository
 import fr.dcproject.routes.PaginatedRequest
 import fr.dcproject.routes.PaginatedRequestI
 import fr.postgresjson.repository.RepositoryI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -27,10 +32,27 @@ object FindConstitutions {
         val sort: String? = null,
         val direction: RepositoryI.Direction? = null,
         val search: String? = null
-    ) : PaginatedRequestI by PaginatedRequest(page, limit)
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
+        fun validate() = Validation<FindConstitutionsRequest> {
+            FindConstitutionsRequest::page {
+                minimum(1)
+            }
+            FindConstitutionsRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            FindConstitutionsRequest::sort ifPresent {
+                enum(
+                    "title",
+                    "createdAt",
+                )
+            }
+        }.validate(this)
+    }
 
     fun Route.findConstitutions(repo: ConstitutionRepository, ac: ConstitutionAccessControl) {
         get<FindConstitutionsRequest> {
+            it.validate().badRequestIfNotValid()
             val constitutions = repo.find(it.page, it.limit, it.sort, it.direction, it.search)
             ac.assert { canView(constitutions.result, citizenOrNull) }
             call.respond(
diff --git a/src/main/kotlin/fr/dcproject/component/notification/Notification.kt b/src/main/kotlin/fr/dcproject/component/notification/Notification.kt
index ff8871c..57e4320 100644
--- a/src/main/kotlin/fr/dcproject/component/notification/Notification.kt
+++ b/src/main/kotlin/fr/dcproject/component/notification/Notification.kt
@@ -1,5 +1,7 @@
 package fr.dcproject.component.notification
 
+import com.fasterxml.jackson.annotation.JsonSubTypes
+import com.fasterxml.jackson.annotation.JsonTypeInfo
 import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.databind.PropertyNamingStrategies
 import com.fasterxml.jackson.databind.SerializationFeature
@@ -12,6 +14,10 @@ import fr.dcproject.component.article.database.ArticleForView
 import org.joda.time.DateTime
 import java.util.concurrent.atomic.AtomicInteger
 
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "type", visible = true)
+@JsonSubTypes(
+    JsonSubTypes.Type(value = ArticleUpdateNotification::class, name = "article")
+)
 open class Notification(
     val type: String,
     val createdAt: DateTime = DateTime.now()
diff --git a/src/main/kotlin/fr/dcproject/component/notification/NotificationsPush.kt b/src/main/kotlin/fr/dcproject/component/notification/NotificationsPush.kt
index 08e6e29..445cca1 100644
--- a/src/main/kotlin/fr/dcproject/component/notification/NotificationsPush.kt
+++ b/src/main/kotlin/fr/dcproject/component/notification/NotificationsPush.kt
@@ -28,12 +28,12 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import org.slf4j.LoggerFactory
 
-class NotificationsPush private constructor(
+class NotificationsPush(
     private val redis: RedisAsyncCommands<String, String>,
     private val redisConnectionPubSub: StatefulRedisPubSubConnection<String, String>,
     citizen: CitizenI,
     incoming: Flow<Notification>,
-    onRecieve: suspend (Notification) -> Unit,
+    onReceive: suspend (Notification) -> Unit,
 ) {
     class Builder(val redisClient: RedisClient) {
         private val redisConnection = redisClient.connect() ?: error("Unable to connect to redis")
@@ -43,8 +43,8 @@ class NotificationsPush private constructor(
         fun build(
             citizen: CitizenI,
             incoming: Flow<Notification>,
-            onRecieve: suspend (Notification) -> Unit,
-        ): NotificationsPush = NotificationsPush(redis, redisConnectionPubSub, citizen, incoming, onRecieve)
+            onReceive: suspend (Notification) -> Unit,
+        ): NotificationsPush = NotificationsPush(redis, redisConnectionPubSub, citizen, incoming, onReceive)
 
         @ExperimentalCoroutinesApi
         fun build(ws: DefaultWebSocketServerSession): NotificationsPush {
@@ -69,7 +69,7 @@ class NotificationsPush private constructor(
         override fun message(pattern: String?, channel: String?, message: String?) {
             runBlocking {
                 getNotifications().collect {
-                    onRecieve(it)
+                    onReceive(it)
                 }
             }
         }
@@ -85,10 +85,12 @@ class NotificationsPush private constructor(
 
         /* Get old notification and sent it to websocket */
         runBlocking {
-            getNotifications().collect { onRecieve(it) }
+            getNotifications().collect {
+                onReceive(it)
+            }
         }
 
-        /* Lisen redis event, and sent the new notification into websocket */
+        /* Listen redis event, and sent the new notification into websocket */
         redisConnectionPubSub.run {
             addListener(listener)
 
diff --git a/src/main/kotlin/fr/dcproject/component/opinion/routes/GetMyOpinionsArticle.kt b/src/main/kotlin/fr/dcproject/component/opinion/routes/GetMyOpinionsArticle.kt
index 7679ace..fe28926 100644
--- a/src/main/kotlin/fr/dcproject/component/opinion/routes/GetMyOpinionsArticle.kt
+++ b/src/main/kotlin/fr/dcproject/component/opinion/routes/GetMyOpinionsArticle.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.opinion.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.entity.TargetRef
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
@@ -12,6 +13,9 @@ import fr.dcproject.component.opinion.database.Opinion
 import fr.dcproject.routes.PaginatedRequest
 import fr.dcproject.routes.PaginatedRequestI
 import fr.postgresjson.connexion.Paginated
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -34,11 +38,22 @@ object GetMyOpinionsArticle {
         limit: Int = 50
     ) : PaginatedRequestI by PaginatedRequest(page, limit) {
         val citizen = CitizenRef(citizen)
+        fun validate() = Validation<CitizenOpinionsArticleRequest> {
+            CitizenOpinionsArticleRequest::page {
+                minimum(1)
+            }
+            CitizenOpinionsArticleRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+        }.validate(this)
     }
 
     fun Route.getMyOpinionsArticle(repo: OpinionArticleRepository, ac: OpinionAccessControl) {
         get<CitizenOpinionsArticleRequest> {
             mustBeAuth()
+            it.validate().badRequestIfNotValid()
+
             val opinions: Paginated<Opinion<TargetRef>> = repo.findCitizenOpinions(citizen, it.page, it.limit)
             ac.assert { canView(opinions.result, citizenOrNull) }
             call.respond(
diff --git a/src/main/kotlin/fr/dcproject/component/vote/routes/GetCitizenVotesOnArticle.kt b/src/main/kotlin/fr/dcproject/component/vote/routes/GetCitizenVotesOnArticle.kt
index d8b5654..102300b 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/routes/GetCitizenVotesOnArticle.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/routes/GetCitizenVotesOnArticle.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.vote.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.component.auth.citizenOrNull
@@ -9,6 +10,9 @@ import fr.dcproject.component.vote.VoteAccessControl
 import fr.dcproject.component.vote.database.VoteArticleRepository
 import fr.dcproject.routes.PaginatedRequest
 import fr.dcproject.routes.PaginatedRequestI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -28,11 +32,22 @@ object GetCitizenVotesOnArticle {
         val search: String? = null
     ) : PaginatedRequestI by PaginatedRequest(page, limit) {
         val citizen = CitizenRef(citizen)
+        fun validate() = Validation<CitizenVoteArticleRequest> {
+            CitizenVoteArticleRequest::page {
+                minimum(1)
+            }
+            CitizenVoteArticleRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+        }.validate(this)
     }
 
     fun Route.getCitizenVotesOnArticle(repo: VoteArticleRepository, ac: VoteAccessControl) {
         get<CitizenVoteArticleRequest> {
             mustBeAuth()
+            it.validate().badRequestIfNotValid()
+
             val votes = repo.findByCitizen(it.citizen, it.page, it.limit)
             ac.assert { canView(votes.result, citizenOrNull) }
 
diff --git a/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnArticle.kt b/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnArticle.kt
index 8f45229..0b169e0 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnArticle.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnArticle.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.vote.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.article.database.ArticleRef
@@ -10,6 +11,9 @@ import fr.dcproject.component.auth.mustBeAuth
 import fr.dcproject.component.vote.VoteAccessControl
 import fr.dcproject.component.vote.database.VoteArticleRepository
 import fr.dcproject.component.vote.database.VoteForUpdate
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
@@ -25,13 +29,22 @@ object PutVoteOnArticle {
     @Location("/articles/{article}/vote")
     class ArticleVoteRequest(article: UUID) {
         val article = ArticleRef(article)
-        data class Input(var note: Int)
+        data class Input(var note: Int) {
+            fun validate() = Validation<Input> {
+                Input::note {
+                    minimum(-1)
+                    maximum(1)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.putVoteOnArticle(repo: VoteArticleRepository, ac: VoteAccessControl, articleRepo: ArticleRepository) {
         put<ArticleVoteRequest> {
             mustBeAuth()
+
             val input = call.receiveOrBadRequest<ArticleVoteRequest.Input>()
+                .apply { validate().badRequestIfNotValid() }
             val article = articleRepo.findById(it.article.id) ?: throw NotFoundException("Article ${it.article.id} not found")
             val vote = VoteForUpdate(
                 target = article,
diff --git a/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnComment.kt b/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnComment.kt
index 8884047..cf65882 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnComment.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnComment.kt
@@ -1,15 +1,21 @@
 package fr.dcproject.component.vote.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.auth.citizen
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.auth.mustBeAuth
+import fr.dcproject.component.comment.generic.database.CommentRef
 import fr.dcproject.component.comment.generic.database.CommentRepository
 import fr.dcproject.component.vote.VoteAccessControl
 import fr.dcproject.component.vote.database.VoteCommentRepository
 import fr.dcproject.component.vote.database.VoteForUpdate
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
+import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.locations.Location
@@ -21,18 +27,29 @@ import java.util.UUID
 @KtorExperimentalLocationsAPI
 object PutVoteOnComment {
     @Location("/comments/{comment}/vote")
-    class CommentVoteRequest(val comment: UUID) {
-        data class Content(var note: Int)
+    class CommentVoteRequest(comment: UUID) {
+        val comment = CommentRef(comment)
+        data class Input(var note: Int) {
+            fun validate() = Validation<Input> {
+                Input::note {
+                    minimum(-1)
+                    maximum(1)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.putVoteOnComment(voteCommentRepo: VoteCommentRepository, commentRepo: CommentRepository, ac: VoteAccessControl) {
         put<CommentVoteRequest> {
             mustBeAuth()
-            val comment = commentRepo.findById(it.comment)!!
-            val content = call.receiveOrBadRequest<CommentVoteRequest.Content>()
+
+            val comment = commentRepo.findById(it.comment.id) ?: throw NotFoundException("Comment ${it.comment.id} not found")
+            val input = call.receiveOrBadRequest<CommentVoteRequest.Input>()
+                .apply { validate().badRequestIfNotValid() }
+
             val vote = VoteForUpdate(
                 target = comment,
-                note = content.note,
+                note = input.note,
                 createdBy = this.citizen
             )
             ac.assert { canCreate(vote, citizenOrNull) }
diff --git a/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnConstitution.kt b/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnConstitution.kt
index 03c30ec..0cb6a8d 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnConstitution.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/routes/PutVoteOnConstitution.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.vote.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.auth.citizen
@@ -11,6 +12,9 @@ import fr.dcproject.component.vote.VoteAccessControl
 import fr.dcproject.component.vote.database.VoteConstitutionRepository
 import fr.dcproject.component.vote.database.VoteForUpdate
 import fr.dcproject.component.vote.routes.PutVoteOnConstitution.ConstitutionVoteRequest.Input
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.http.HttpStatusCode
@@ -26,17 +30,25 @@ object PutVoteOnConstitution {
     @Location("/constitutions/{constitution}/vote")
     class ConstitutionVoteRequest(constitution: UUID) {
         val constitution = ConstitutionRef(constitution)
-        data class Input(var note: Int)
+        data class Input(var note: Int) {
+            fun validate() = Validation<Input> {
+                Input::note {
+                    minimum(-1)
+                    maximum(1)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.voteConstitution(repo: VoteConstitutionRepository, ac: VoteAccessControl, constitutionRepo: ConstitutionRepository) {
         put<ConstitutionVoteRequest> {
             mustBeAuth()
             val constitution = constitutionRepo.findById(it.constitution.id) ?: throw NotFoundException("Unable to find constitution ${it.constitution.id}")
-            val content = call.receiveOrBadRequest<Input>()
+            val input = call.receiveOrBadRequest<Input>()
+                .apply { validate().badRequestIfNotValid() }
             val vote = VoteForUpdate(
                 target = constitution,
-                note = content.note,
+                note = input.note,
                 createdBy = this.citizen
             )
             ac.assert { canCreate(vote, citizenOrNull) }
diff --git a/src/main/kotlin/fr/dcproject/component/workgroup/routes/CreateWorkgroup.kt b/src/main/kotlin/fr/dcproject/component/workgroup/routes/CreateWorkgroup.kt
index 4c7f2b1..fcec099 100644
--- a/src/main/kotlin/fr/dcproject/component/workgroup/routes/CreateWorkgroup.kt
+++ b/src/main/kotlin/fr/dcproject/component/workgroup/routes/CreateWorkgroup.kt
@@ -1,8 +1,9 @@
 package fr.dcproject.component.workgroup.routes
 
-import fr.dcproject.common.response.toOutput
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
+import fr.dcproject.common.validation.isUrl
 import fr.dcproject.component.auth.citizen
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.auth.mustBeAuth
@@ -10,6 +11,9 @@ import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.database.WorkgroupForUpdate
 import fr.dcproject.component.workgroup.database.WorkgroupRepository
 import fr.dcproject.component.workgroup.routes.CreateWorkgroup.PostWorkgroupRequest.Input
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -29,13 +33,30 @@ object CreateWorkgroup {
             val description: String,
             val logo: String?,
             val anonymous: Boolean?
-        )
+        ) {
+            fun validate() = Validation<Input> {
+                Input::name {
+                    minLength(5)
+                    maxLength(80)
+                }
+                Input::description {
+                    minLength(50)
+                    maxLength(6000)
+                }
+                Input::logo ifPresent {
+                    isUrl()
+                    maxLength(2048)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.createWorkgroup(repo: WorkgroupRepository, ac: WorkgroupAccessControl) {
         post<PostWorkgroupRequest> {
             mustBeAuth()
             call.receiveOrBadRequest<Input>().run {
+                validate().badRequestIfNotValid()
+
                 WorkgroupForUpdate(
                     id ?: UUID.randomUUID(),
                     name,
diff --git a/src/main/kotlin/fr/dcproject/component/workgroup/routes/EditWorkgroup.kt b/src/main/kotlin/fr/dcproject/component/workgroup/routes/EditWorkgroup.kt
index 4d96298..b116b7d 100644
--- a/src/main/kotlin/fr/dcproject/component/workgroup/routes/EditWorkgroup.kt
+++ b/src/main/kotlin/fr/dcproject/component/workgroup/routes/EditWorkgroup.kt
@@ -1,13 +1,18 @@
 package fr.dcproject.component.workgroup.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
+import fr.dcproject.common.validation.isUrl
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.auth.mustBeAuth
 import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.database.WorkgroupForUpdate
 import fr.dcproject.component.workgroup.database.WorkgroupRepository
 import fr.dcproject.component.workgroup.routes.EditWorkgroup.PutWorkgroupRequest.Input
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.maxLength
+import io.konform.validation.jsonschema.minLength
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -27,7 +32,22 @@ object EditWorkgroup {
             val description: String?,
             val logo: String?,
             val anonymous: Boolean?
-        )
+        ) {
+            fun validate() = Validation<Input> {
+                Input::name ifPresent {
+                    minLength(5)
+                    maxLength(80)
+                }
+                Input::description ifPresent {
+                    minLength(50)
+                    maxLength(6000)
+                }
+                Input::logo ifPresent {
+                    isUrl()
+                    maxLength(2048)
+                }
+            }.validate(this)
+        }
     }
 
     fun Route.editWorkgroup(repo: WorkgroupRepository, ac: WorkgroupAccessControl) {
@@ -35,6 +55,7 @@ object EditWorkgroup {
             mustBeAuth()
             repo.findById(it.workgroupId)?.let { old ->
                 call.receiveOrBadRequest<Input>().run {
+                    validate().badRequestIfNotValid()
                     WorkgroupForUpdate(
                         id = old.id,
                         name = name ?: old.name,
diff --git a/src/main/kotlin/fr/dcproject/component/workgroup/routes/GetWorkgroups.kt b/src/main/kotlin/fr/dcproject/component/workgroup/routes/GetWorkgroups.kt
index 40f79ba..be8a606 100644
--- a/src/main/kotlin/fr/dcproject/component/workgroup/routes/GetWorkgroups.kt
+++ b/src/main/kotlin/fr/dcproject/component/workgroup/routes/GetWorkgroups.kt
@@ -1,12 +1,20 @@
 package fr.dcproject.component.workgroup.routes
 
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.toUUID
+import fr.dcproject.common.validation.isUuid
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.workgroup.WorkgroupAccessControl
 import fr.dcproject.component.workgroup.database.WorkgroupRepository
+import fr.dcproject.routes.PaginatedRequest
+import fr.dcproject.routes.PaginatedRequestI
 import fr.postgresjson.repository.RepositoryI
+import io.konform.validation.Validation
+import io.konform.validation.jsonschema.enum
+import io.konform.validation.jsonschema.maximum
+import io.konform.validation.jsonschema.minimum
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.locations.KtorExperimentalLocationsAPI
@@ -27,23 +35,40 @@ object GetWorkgroups {
         val search: String? = null,
         val createdBy: String? = null,
         members: List<String?>? = null
-    ) {
-        val page: Int = if (page < 1) 1 else page
-        val limit: Int = if (limit > 50) 50 else if (limit < 1) 1 else limit
+    ) : PaginatedRequestI by PaginatedRequest(page, limit) {
         val members: List<UUID>? = members?.toUUID()
+        fun validate() = Validation<WorkgroupsRequest> {
+            WorkgroupsRequest::page {
+                minimum(1)
+            }
+            WorkgroupsRequest::limit {
+                minimum(1)
+                maximum(50)
+            }
+            WorkgroupsRequest::sort ifPresent {
+                enum(
+                    "name",
+                    "createdAt",
+                )
+            }
+            WorkgroupsRequest::createdBy ifPresent {
+                isUuid()
+            }
+        }.validate(this)
     }
 
     fun Route.getWorkgroups(repo: WorkgroupRepository, ac: WorkgroupAccessControl) {
         get<WorkgroupsRequest> {
-            val workgroups =
-                repo.find(
-                    it.page,
-                    it.limit,
-                    it.sort,
-                    it.direction,
-                    it.search,
-                    WorkgroupRepository.Filter(createdById = it.createdBy, members = it.members)
-                )
+            it.validate().badRequestIfNotValid()
+
+            val workgroups = repo.find(
+                it.page,
+                it.limit,
+                it.sort,
+                it.direction,
+                it.search,
+                WorkgroupRepository.Filter(createdById = it.createdBy, members = it.members)
+            )
             ac.assert { canView(workgroups.result, citizenOrNull) }
             call.respond(
                 HttpStatusCode.OK,
diff --git a/src/main/resources/openapi.yaml b/src/main/resources/openapi.yaml
index b204c7e..6afa21e 100644
--- a/src/main/resources/openapi.yaml
+++ b/src/main/resources/openapi.yaml
@@ -41,6 +41,12 @@ paths:
                         maxItems: 50
                         items:
                           $ref: '#/components/schemas/ArticleListingResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
     post:
       security:
         - JWTAuth: []
@@ -65,16 +71,21 @@ paths:
                     Limit power of press
                 content:
                   type: string
+                  minLength: 50
+                  maxLength: 6000
                   example:
                     Lorem upsum...
                 description:
                   type: string
+                  minLength: 50
+                  maxLength: 6000
                   example:
                     I think is the bether choice
                 tags:
                   type: array
                   items:
                     type: string
+                    maxItems: 15
                   default: [ ]
                   example: [ power, press ]
                 anonymous:
@@ -106,6 +117,12 @@ paths:
                     format: uuid
                   versionNumber:
                     type: integer
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
         403:
@@ -128,6 +145,12 @@ paths:
       tags:
         - article
       operationId: getArticle
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
+        - $ref: '#/components/parameters/sort'
+        - $ref: '#/components/parameters/direction'
+        - $ref: '#/components/parameters/search'
       responses:
         200:
           description: The Article objects
@@ -135,6 +158,19 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/ArticleResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
+        404:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/404'
+
   /articles/{article}/versions:
     parameters:
       - $ref: '#/components/parameters/article'
@@ -143,6 +179,12 @@ paths:
       tags:
         - article
       operationId: getArticleVersions
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
+        - $ref: '#/components/parameters/sort'
+        - $ref: '#/components/parameters/direction'
+        - $ref: '#/components/parameters/search'
       responses:
         200:
           description: The versions of Article
@@ -193,6 +235,12 @@ paths:
                                   format: uuid
                                 name:
                                   type: string
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
 
   /login:
     post:
@@ -310,7 +358,7 @@ paths:
           content:
             application/json:
               schema:
-                description: sdf
+                $ref: '#/components/schemas/400'
   /auth/passwordless:
     post:
       summary: Send a connexion link by email
@@ -354,7 +402,7 @@ paths:
       parameters:
         - $ref: '#/components/parameters/page'
         - $ref: '#/components/parameters/limit'
-        - $ref: '#/components/parameters/sort'
+        - $ref: '#/components/parameters/citizenSort'
         - $ref: '#/components/parameters/direction'
         - $ref: '#/components/parameters/search'
       responses:
@@ -371,6 +419,12 @@ paths:
                         type: array
                         items:
                           $ref: '#/components/schemas/CitizenListResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
   /citizens/current:
@@ -443,6 +497,10 @@ paths:
           description: Password changed
         400:
           description: Bad request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
         404:
@@ -464,13 +522,13 @@ paths:
           in: query
           required: false
           example:
-            - created_at
+            - createdAt
             - votes
           schema:
             type: string
-            default: created_at
+            default: createdAt
             enum:
-              - created_at
+              - createdAt
               - votes
       responses:
         200:
@@ -486,6 +544,12 @@ paths:
                         type: array
                         items:
                           $ref: '#/components/schemas/CommentResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
     post:
       security:
         - JWTAuth: [ ]
@@ -503,8 +567,10 @@ paths:
               properties:
                 content:
                   type: string
+                  minLength: 20
+                  maxLength: 6000
                   example:
-                    Lorem ipsum...
+                    Lorem ipsum dolor sit amet, consectetur adipiscing elit.Lorem ipsum...
       responses:
         201:
           description: Return created Comment
@@ -512,6 +578,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CommentResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
   /comments/{comment}:
@@ -528,6 +600,42 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CommentResponse'
+    post:
+      security:
+        - JWTAuth: []
+      summary: create comment
+      tags:
+        - comment
+      requestBody:
+        content:
+          application/json:
+            schema:
+              required:
+                - content
+              properties:
+                content:
+                  type: string
+                  minLength: 20
+                  maxLength: 6000
+                  example:
+                    Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+      responses:
+        201:
+          description: Return updated comment
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/CommentResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
+        401:
+          $ref: '#/components/responses/401'
+        404:
+          description: No comment found
     put:
       security:
         - JWTAuth: []
@@ -543,8 +651,10 @@ paths:
               properties:
                 content:
                   type: string
+                  minLength: 20
+                  maxLength: 6000
                   example:
-                    Lorem ipsum...
+                    Lorem ipsum dolor sit amet, consectetur adipiscing elit.
       responses:
         200:
           description: Return updated comment
@@ -552,6 +662,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CommentResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
   /comments/{comment}/children:
@@ -637,13 +753,42 @@ paths:
       tags:
         - comment
         - constitution
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
+        - $ref: '#/components/parameters/search'
+        - name: sort
+          in: query
+          required: false
+          example:
+            - createdAt
+            - votes
+          schema:
+            type: string
+            default: createdAt
+            enum:
+              - createdAt
+              - votes
       responses:
         200:
           description: Return Comment and children
           content:
             application/json:
               schema:
-                $ref: '#/components/schemas/CommentResponse'
+                allOf:
+                  - $ref: '#/components/schemas/Paginated'
+                  - type: object
+                    properties:
+                      result:
+                        type: array
+                        items:
+                          $ref: '#/components/schemas/CommentResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
     post:
       security:
         - JWTAuth: []
@@ -660,8 +805,10 @@ paths:
               properties:
                 content:
                   type: string
+                  minLength: 20
+                  maxLength: 6000
                   example:
-                    Lorem ipsum...
+                    Lorem ipsum dolor sit amet, consectetur adipiscing elit.
       responses:
         201:
           description: Return created comment
@@ -669,6 +816,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/CommentResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
 
@@ -698,6 +851,12 @@ paths:
                         type: array
                         items:
                           $ref: '#/components/schemas/ConstitutionListingResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
     post:
       security:
         - JWTAuth: [ ]
@@ -722,7 +881,11 @@ paths:
         401:
           $ref: '#/components/responses/401'
         400:
-          $ref: '#/components/responses/400'
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
   /constitutions/{constitution}:
     parameters:
       - $ref: '#/components/parameters/constitution'
@@ -955,6 +1118,9 @@ paths:
       tags:
         - opinion
         - citizen
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
       responses:
         200:
           description: Opinions
@@ -969,6 +1135,13 @@ paths:
                         type: array
                         items:
                           $ref: '#/components/schemas/Opinion'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
+
   /articles/{article}/opinions:
     parameters:
       - $ref: '#/components/parameters/article'
@@ -1021,6 +1194,12 @@ paths:
       responses:
         201:
           description: Return only http status 201 on success
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
   /citizens/{citizen}/votes:
     parameters:
       - $ref: '#/components/parameters/citizen'
@@ -1079,6 +1258,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/VoteAggregation'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
   /citizens/{citizen}/votes/articles:
@@ -1092,6 +1277,9 @@ paths:
         - vote
         - article
         - citizen
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
       responses:
         200:
           description: Votes
@@ -1106,6 +1294,12 @@ paths:
                         type: array
                         items:
                           $ref: '#/components/schemas/VoteResponse'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
   /articles/{article}/vote:
@@ -1130,6 +1324,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/VoteAggregation'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
         401:
           $ref: '#/components/responses/401'
 
@@ -1159,6 +1359,12 @@ paths:
                         type: array
                         items:
                           $ref: '#/components/schemas/WorkgroupListing'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
     post:
       summary: Create new Workgroup
       security:
@@ -1197,6 +1403,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Workgroup'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
   /workgroups/{workgroup}:
     parameters:
       - $ref: '#/components/parameters/workgroup'
@@ -1245,6 +1457,12 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Workgroup'
+        400:
+          description: BadReqest
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/400'
     delete:
       summary: Delete one workgroup
       security:
@@ -1373,6 +1591,17 @@ components:
           - createdAt
           - vote
           - popularity
+    citizenSort:
+      name: sort
+      in: query
+      description: The sort field name
+      example: createdAt
+      required: false
+      schema:
+        type: string
+        enum:
+          - title
+          - createdAt
     workgroupSort:
       name: sort
       in: query
@@ -1855,6 +2084,8 @@ components:
           $ref: '#/components/schemas/UUID'
         title:
           type: string
+          minLength: 10
+          maxLength: 80
           example:
             Constitution for the liberty
         titles:
@@ -1870,6 +2101,8 @@ components:
                 $ref: '#/components/schemas/UUID'
               name:
                 type: string
+                minLength: 10
+                maxLength: 80
                 example:
                   The liberties
               articles:
@@ -2209,6 +2442,47 @@ components:
                 - REPORTER
               example: MASTER
 
+    400:
+      description: Bad Request
+      required:
+        - title
+        - invalidParams
+      additionalProperties: false
+      properties:
+        statusCode:
+          type: integer
+          example: 400
+        title:
+          type: string
+          example: Bad Request
+        invalidParams:
+          type: array
+          items:
+            required:
+              - name
+              - reason
+            properties:
+              name:
+                type: string
+                example: '.title'
+              reason:
+                type: string
+                example: 'Cannot be null'
+
+    404:
+      description: Not Found
+      required:
+        - title
+        - statusCode
+      additionalProperties: false
+      properties:
+        statusCode:
+          type: integer
+          example: 404
+        title:
+          type: string
+          example: Bad Request
+
   securitySchemes:
     JWTAuth:
       type: http
diff --git a/src/main/resources/sql/functions/article/find_articles.sql b/src/main/resources/sql/functions/article/find_articles.sql
index 75164b2..ece47ee 100644
--- a/src/main/resources/sql/functions/article/find_articles.sql
+++ b/src/main/resources/sql/functions/article/find_articles.sql
@@ -45,7 +45,7 @@ begin
         case direction when 'asc' then
             case sort
                 when 'title' then a.title
-                when 'created_at' then a.created_at::text
+                when 'createdAt' then a.created_at::text
                 when 'vote' then ca.score::text
                 when 'popularity' then ca.total::text
                 else null
@@ -54,7 +54,7 @@ begin
         case direction when 'desc' then
             case sort
                 when 'title' then a.title
-                when 'created_at' then a.created_at::text
+                when 'createdAt' then a.created_at::text
                 when 'vote' then ca.score::text
                 when 'popularity' then ca.total::text
             end
diff --git a/src/main/resources/sql/functions/citizen/find_citizens.sql b/src/main/resources/sql/functions/citizen/find_citizens.sql
index c5f5a0f..a37a667 100644
--- a/src/main/resources/sql/functions/citizen/find_citizens.sql
+++ b/src/main/resources/sql/functions/citizen/find_citizens.sql
@@ -23,14 +23,14 @@ begin
         case direction when 'asc' then
             case sort
                 when 'name' then (z.name->'first_name')::text
-                when 'created_at' then z.created_at::text
+                when 'createdAt' then z.created_at::text
                 else null
             end
         end,
         case direction when 'desc' then
             case sort
                 when 'name' then (z.name->'first_name')::text
-                when 'created_at' then z.created_at::text
+                when 'createdAt' then z.created_at::text
             end
         end
         desc,
diff --git a/src/main/resources/sql/functions/comment/comment.sql b/src/main/resources/sql/functions/comment/comment.sql
index 803515b..b4228e2 100644
--- a/src/main/resources/sql/functions/comment/comment.sql
+++ b/src/main/resources/sql/functions/comment/comment.sql
@@ -1,4 +1,4 @@
-create or replace function comment(reference regclass, resource json, out _id uuid)
+create or replace function comment(reference regclass, inout resource json)
     language plpgsql as
 $$
 declare
@@ -17,7 +17,8 @@ begin
     else
         raise exception 'comment with target as "%", is not implemented', reference::text;
     end if;
-    _id = _new_id;
+
+    select find_comment_by_id(_new_id) into resource;
 end;
 $$;
 
diff --git a/src/main/resources/sql/functions/comment/edit_comment.sql b/src/main/resources/sql/functions/comment/edit_comment.sql
index f68039e..8485f89 100644
--- a/src/main/resources/sql/functions/comment/edit_comment.sql
+++ b/src/main/resources/sql/functions/comment/edit_comment.sql
@@ -1,9 +1,11 @@
-create or replace function edit_comment(_id uuid, _content text) returns void
+create or replace function edit_comment(_id uuid, _content text, out resource json)
     language plpgsql as
 $$
 begin
     update comment c set
         "content" = _content
     where c.id = _id;
+
+    select find_comment_by_id(_id) into resource;
 end;
 $$;
diff --git a/src/main/resources/sql/functions/comment/find_comments_by_target.sql b/src/main/resources/sql/functions/comment/find_comments_by_target.sql
index 8a78bdc..a35fd9c 100644
--- a/src/main/resources/sql/functions/comment/find_comments_by_target.sql
+++ b/src/main/resources/sql/functions/comment/find_comments_by_target.sql
@@ -26,7 +26,7 @@ begin
                 else null
             end desc,
             case sort
-                when 'created_at' then com.created_at::text
+                when 'createdAt' then com.created_at::text
                 else null
             end desc,
         com.created_at desc
diff --git a/src/main/resources/sql/functions/constitution/find_constitutions.sql b/src/main/resources/sql/functions/constitution/find_constitutions.sql
index 1dae8c0..9f2be1c 100644
--- a/src/main/resources/sql/functions/constitution/find_constitutions.sql
+++ b/src/main/resources/sql/functions/constitution/find_constitutions.sql
@@ -22,14 +22,14 @@ begin
         case direction when 'asc' then
             case sort
                 when 'title' then c.title
-                when 'created_at' then c.created_at::text
+                when 'createdAt' then c.created_at::text
                 else null
             end
         end,
         case direction when 'desc' then
             case sort
                 when 'title' then c.title
-                when 'created_at' then c.created_at::text
+                when 'createdAt' then c.created_at::text
             end
         end
         desc,
diff --git a/src/main/resources/sql/functions/follow/find_follows_article_by_target.sql b/src/main/resources/sql/functions/follow/find_follows_article_by_target.sql
index fb08b76..6baded1 100644
--- a/src/main/resources/sql/functions/follow/find_follows_article_by_target.sql
+++ b/src/main/resources/sql/functions/follow/find_follows_article_by_target.sql
@@ -21,7 +21,7 @@ begin
             f.created_at,
             f.target_reference,
             json_build_object('id', f.target_id) as target,
-            json_build_object('id', f.created_by_id) as created_by
+            find_citizen_by_id_with_user(f.created_by_id) as created_by
         from follow_article as f
         join article a on f.target_id = a.id
         where a.version_id = _version_id
diff --git a/src/main/resources/sql/functions/workgroup/find_workgroups.sql b/src/main/resources/sql/functions/workgroup/find_workgroups.sql
index 8a1d86b..3600ed2 100644
--- a/src/main/resources/sql/functions/workgroup/find_workgroups.sql
+++ b/src/main/resources/sql/functions/workgroup/find_workgroups.sql
@@ -2,7 +2,7 @@ create or replace function find_workgroups(
     _search text default null,
     _filter json default '{}',
     direction text default 'desc',
-    sort text default 'created_at',
+    sort text default 'createdAt',
     "limit" int default 50,
     "offset" int default 0,
     out resource json,
@@ -41,14 +41,14 @@ begin
         case direction when 'asc' then
             case sort
                 when 'name' then w.name
-                when 'created_at' then w.created_at::text
+                when 'createdAt' then w.created_at::text
                 else null
             end
         end,
         case direction when 'desc' then
             case sort
                 when 'name' then w.name
-                when 'created_at' then w.created_at::text
+                when 'createdAt' then w.created_at::text
             end
         end
         desc,
diff --git a/src/test/kotlin/functional/NotificationsPushTest.kt b/src/test/kotlin/functional/NotificationsPushTest.kt
index cedbaf6..7464c6b 100644
--- a/src/test/kotlin/functional/NotificationsPushTest.kt
+++ b/src/test/kotlin/functional/NotificationsPushTest.kt
@@ -30,7 +30,7 @@ internal class NotificationsPushTest {
         @BeforeAll
         @JvmStatic
         fun before() {
-            val config: Configuration = Configuration("application-test.conf")
+            val config = Configuration("application-test.conf")
             RedisClient.create(config.redis).connect().sync().flushall()
 
             /* Purge rabbit notification queues */
@@ -45,7 +45,7 @@ internal class NotificationsPushTest {
 
     @Test
     fun `Notification from redis is well catch and return`() = runBlocking {
-        val config: Configuration = Configuration("application-test.conf")
+        val config = Configuration("application-test.conf")
         /* Redis client for test */
         val redisClientTest = RedisClient.create(config.redis)
 
@@ -74,7 +74,7 @@ internal class NotificationsPushTest {
         }
         val notifAfterSubscribe = ArticleUpdateNotification(article)
 
-        /* init event for emulate incomint message from websocket */
+        /* init event for emulate incoming message from websocket */
         val event = MutableSharedFlow<Notification>()
         val incomingFlow = event.asSharedFlow()
 
diff --git a/src/test/kotlin/functional/ViewTest.kt b/src/test/kotlin/functional/ViewTest.kt
index d8a74d7..5e8df91 100644
--- a/src/test/kotlin/functional/ViewTest.kt
+++ b/src/test/kotlin/functional/ViewTest.kt
@@ -2,6 +2,7 @@ package functional
 
 import fr.dcproject.application.Env.TEST
 import fr.dcproject.application.module
+import fr.dcproject.common.utils.retry
 import fr.dcproject.component.article.database.ArticleForView
 import fr.dcproject.component.article.database.ArticleViewRepository
 import fr.dcproject.component.auth.database.UserCreator
@@ -20,6 +21,8 @@ import org.junit.jupiter.api.TestInstance
 import org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS
 import org.koin.ktor.ext.get
 import java.util.UUID
+import kotlin.time.ExperimentalTime
+import kotlin.time.seconds
 
 @KtorExperimentalLocationsAPI
 @KtorExperimentalAPI
@@ -27,6 +30,7 @@ import java.util.UUID
 @TestInstance(PER_CLASS)
 @Tags(Tag("functional"), Tag("view"))
 class ViewTest {
+    @ExperimentalTime
     @Test
     fun `test View Article`() {
         val article = ArticleForView(
@@ -75,15 +79,15 @@ class ViewTest {
                 article
             )
 
-            /* Sleep because ES is not sync ! */
-            Thread.sleep(1000)
+            /* Retry because ES is not sync ! */
+            retry(10, 0.3.seconds) {
+                /* Get view */
+                val afterView = viewRepository.getViewsCount(article)
 
-            /* Get view */
-            val afterView = viewRepository.getViewsCount(article)
-
-            /* Check if view has increment */
-            afterView.total `should be equal to` startView.total + 4
-            afterView.unique `should be equal to` startView.unique + 3
+                /* Check if view has increment */
+                afterView.total `should be equal to` startView.total + 4
+                afterView.unique `should be equal to` startView.unique + 3
+            }
         }
     }
 }
diff --git a/src/test/kotlin/integration/Article routes.kt b/src/test/kotlin/integration/Article routes.kt
index 0ed6685..96e6d60 100644
--- a/src/test/kotlin/integration/Article routes.kt	
+++ b/src/test/kotlin/integration/Article routes.kt	
@@ -1,5 +1,7 @@
 package integration
 
+import fr.dcproject.common.utils.toUUID
+import integration.steps.`when`.Validate
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a POST request`
 import integration.steps.`when`.`with body`
@@ -16,9 +18,11 @@ import integration.steps.then.`And the response should contain`
 import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`And the response should not contain`
 import integration.steps.then.`Then the response should be`
-import integration.steps.then.`whish contains`
+import integration.steps.then.`which contains`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Forbidden
+import io.ktor.http.HttpStatusCode.Companion.NotFound
 import io.ktor.http.HttpStatusCode.Companion.OK
 import org.junit.jupiter.api.Tag
 import org.junit.jupiter.api.Tags
@@ -32,13 +36,24 @@ class `Article routes` : BaseTest() {
     fun `I can get article list`() {
         withIntegrationApplication {
             `Given I have articles`(3)
-            `When I send a GET request`("/articles") `Then the response should be` OK and {
+            `Given I have article`(createdBy = "ddb17f17-e8ab-4ada-bdf7-bfd6b0f1b5ed".toUUID())
+            `When I send a GET request`("/articles?page=1&limit=10&sort=title&createdBy=ddb17f17-e8ab-4ada-bdf7-bfd6b0f1b5ed") `Then the response should be` OK and {
                 `And the response should not be null`()
                 `And the response should contain pattern`("$.result[0].createdBy.name.firstName", "firstName.+")
-                `And the response should contain pattern`("$.result[1].createdBy.name.firstName", "firstName.+")
-                `And the response should contain pattern`("$.result[2].createdBy.name.firstName", "firstName.+")
-                `And the response should not contain`("$.result[3]")
-                `And the response should contain list`("$.result", 3)
+                `And the response should not contain`("$.result[1]")
+                `And the response should contain list`("$.result", 1)
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get article list`() {
+        withIntegrationApplication {
+            `Given I have articles`(3)
+            `When I send a GET request`("/articles?page=1&limit=10&sort=title&createdBy=hello", Validate.ALL - Validate.REQUEST_PARAM) `Then the response should be` BadRequest and {
+                `And the response should contain`("$.invalidParams[*].name", ".createdBy")
+                `And the response should contain`("$.invalidParams[*].reason", "must be UUID")
             }
         }
     }
@@ -51,8 +66,8 @@ class `Article routes` : BaseTest() {
             `Given I have article created by workgroup`("2bccd5a7-9082-4b31-88f8-e25d70b22b12")
             `When I send a GET request`("/articles?workgroup=2bccd5a7-9082-4b31-88f8-e25d70b22b12") `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.total") `whish contains` 1
-                `And have property`("$.result[0]workgroup.name") `whish contains` "Les papy"
+                `And have property`("$.total") `which contains` 1
+                `And have property`("$.result[0]workgroup.name") `which contains` "Les papy"
             }
         }
     }
@@ -63,7 +78,31 @@ class `Article routes` : BaseTest() {
             `Given I have article`(id = "65cda9f3-8991-4420-8d41-1da9da72c9bb")
             `When I send a GET request`("/articles/65cda9f3-8991-4420-8d41-1da9da72c9bb") `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.id") `whish contains` "65cda9f3-8991-4420-8d41-1da9da72c9bb"
+                `And have property`("$.id") `which contains` "65cda9f3-8991-4420-8d41-1da9da72c9bb"
+            }
+        }
+    }
+
+    @Test
+    fun `I cannot get article with id doesn't exist`() {
+        withIntegrationApplication {
+            `When I send a GET request`("/articles/635fe2e8-2dbc-4c80-b306-101d38a4ab23") `Then the response should be` NotFound and {
+                `And the response should not be null`()
+                `And the response should contain`("$.title", "Article 635fe2e8-2dbc-4c80-b306-101d38a4ab23 not found")
+                `And the response should contain`("$.statusCode", 404)
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get article by id with wrong id format`() {
+        withIntegrationApplication {
+            `Given I have article`(id = "65cda9f3-8991-4420-8d41-1da9da72c9bb")
+            `When I send a GET request`("/articles/abcd") `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", "ID")
+                `And the response should contain`("$.invalidParams[0].reason", "must be UUID")
             }
         }
     }
@@ -72,10 +111,36 @@ class `Article routes` : BaseTest() {
     fun `I can get versions of article by the id`() {
         withIntegrationApplication {
             `Given I have article`(id = "13e6091c-8fed-4600-b079-a97a6b7a9800")
-            `When I send a GET request`("/articles/13e6091c-8fed-4600-b079-a97a6b7a9800/versions") `Then the response should be` OK and {
+            `When I send a GET request`("/articles/13e6091c-8fed-4600-b079-a97a6b7a9800/versions?page=1&limit=10&sort=title") `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.total") `whish contains` 1
-                `And have property`("$.result[0].id") `whish contains` "13e6091c-8fed-4600-b079-a97a6b7a9800"
+                `And have property`("$.total") `which contains` 1
+                `And have property`("$.result[0].id") `which contains` "13e6091c-8fed-4600-b079-a97a6b7a9800"
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get versions of article by the id with wrong id`() {
+        withIntegrationApplication {
+            `Given I have article`(id = "13e6091c-8fed-4600-b079-a97a6b7a9800")
+            `When I send a GET request`("/articles/abcd/versions") `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".article")
+                `And the response should contain`("$.invalidParams[0].reason", "must be UUID")
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get versions of article by the id with wrong request`() {
+        withIntegrationApplication {
+            `Given I have article`(id = "13e6091c-8fed-4600-b079-a97a6b7a9800")
+            `When I send a GET request`("/articles/13e6091c-8fed-4600-b079-a97a6b7a9800/versions?page=1&limit=10&sort=wrong") `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".sort")
+                `And the response should contain pattern`("$.invalidParams[0].reason", "must be one of: ('[^']+'(, )?)+")
             }
         }
     }
@@ -92,8 +157,8 @@ class `Article routes` : BaseTest() {
                       "versionId": "09c418b6-63ba-448b-b38b-502b41cd500e",
                       "title": "title2",
                       "anonymous": false,
-                      "content": "content2",
-                      "description": "description2",
+                      "content": "Sed malesuada ante et sem congue, scelerisque feugiat lorem viverra.",
+                      "description": "Sed vulputate, ligula id porta posuere, sapien lorem mattis arcu, sit amet luctus erat orci sed tellus.",
                       "tags": [
                           "green"
                       ]
@@ -102,12 +167,13 @@ class `Article routes` : BaseTest() {
                 )
             } `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.versionId") `whish contains` "09c418b6-63ba-448b-b38b-502b41cd500e"
+                `And have property`("$.versionId") `which contains` "09c418b6-63ba-448b-b38b-502b41cd500e"
             }
         }
     }
 
     @Test
+    @Tag("Forbidden")
     fun `I cannot create an article if I'm not connected`() {
         withIntegrationApplication {
             `When I send a POST request`("/articles") {
@@ -117,8 +183,8 @@ class `Article routes` : BaseTest() {
                       "versionId": "e3c7ce42-241c-4caf-9a59-aba4e466440e",
                       "title": "title2",
                       "anonymous": false,
-                      "content": "content2",
-                      "description": "description2",
+                      "content": "Sed malesuada ante et sem congue, scelerisque feugiat lorem viverra.",
+                      "description": "Sed vulputate, ligula id porta posuere, sapien lorem mattis arcu, sit amet luctus erat orci sed tellus.",
                       "tags": [
                           "green"
                       ]
@@ -132,4 +198,35 @@ class `Article routes` : BaseTest() {
             }
         }
     }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot create an article with wrong request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("John", "Doe")
+            `When I send a POST request`("/articles", Validate.NONE) {
+                `authenticated as`("John", "Doe")
+                `with body`(
+                    """
+                    {
+                      "versionId": "09c418b6-63ba-448b-b38b-502b41cd500e",
+                      "title": "title2",
+                      "anonymous": false,
+                      "content": "content2",
+                      "description": "description2",
+                      "tags": [
+                          "green"
+                      ]
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".content")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 50 characters")
+                `And the response should contain`("$.invalidParams[1].name", ".description")
+                `And the response should contain`("$.invalidParams[1].reason", "must have at least 50 characters")
+            }
+        }
+    }
 }
diff --git a/src/test/kotlin/integration/Citizen routes.kt b/src/test/kotlin/integration/Citizen routes.kt
index 602212b..95c445e 100644
--- a/src/test/kotlin/integration/Citizen routes.kt	
+++ b/src/test/kotlin/integration/Citizen routes.kt	
@@ -9,7 +9,7 @@ import integration.steps.given.`authenticated as`
 import integration.steps.then.`And have property`
 import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
-import integration.steps.then.`whish contains`
+import integration.steps.then.`which contains`
 import integration.steps.then.and
 import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Created
@@ -26,7 +26,7 @@ class `Citizen routes` : BaseTest() {
     fun `I can get Citizens information`() {
         withIntegrationApplication {
             `Given I have citizen`("Jean", "Perrin", id = "5267a5c6-af42-4a02-aa2b-6b71d2e43973")
-            `When I send a GET request`("/citizens") {
+            `When I send a GET request`("/citizens?page=1&limit=5&sort=createdAt") {
                 `authenticated as`("Jean", "Perrin")
             } `Then the response should be` OK and {
                 `And the response should not be null`()
@@ -34,6 +34,19 @@ class `Citizen routes` : BaseTest() {
         }
     }
 
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get Citizens information with wrong request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Jean", "Perrin", id = "5267a5c6-af42-4a02-aa2b-6b71d2e43973")
+            `When I send a GET request`("/citizens?page=1&limit=5&sort=created_at", Validate.ALL - Validate.REQUEST_PARAM) {
+                `authenticated as`("Jean", "Perrin")
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+            }
+        }
+    }
+
     @Test
     fun `I can get specific Citizen information`() {
         withIntegrationApplication {
@@ -42,7 +55,7 @@ class `Citizen routes` : BaseTest() {
                 `authenticated as`("Linus", "Pauling")
             } `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.id") `whish contains` "47a05c0f-7329-46c3-a7d0-325db37e9114"
+                `And have property`("$.id") `which contains` "47a05c0f-7329-46c3-a7d0-325db37e9114"
             }
         }
     }
@@ -55,7 +68,7 @@ class `Citizen routes` : BaseTest() {
                 `authenticated as`("Henri", "Becquerel")
             } `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.id") `whish contains` "47356809-c8ef-4649-8b99-1c5cb9886d38"
+                `And have property`("$.id") `which contains` "47356809-c8ef-4649-8b99-1c5cb9886d38"
             }
         }
     }
@@ -69,8 +82,8 @@ class `Citizen routes` : BaseTest() {
                 `with body`(
                     """
                     {
-                      "oldPassword": "azerty",
-                      "newPassword": "qwerty"
+                      "oldPassword": "Azerty123!",
+                      "newPassword": "Qwerty123!"
                     }
                     """
                 )
@@ -79,6 +92,7 @@ class `Citizen routes` : BaseTest() {
     }
 
     @Test
+    @Tag("BadRequest")
     fun `I cannot change my password if request is bad formatted`() {
         withIntegrationApplication {
             `Given I have citizen`("Louis", "Breguet", id = "6cf2a19d-d15d-4ee5-b2a9-907afd26b525")
diff --git a/src/test/kotlin/integration/Comment articles routes.kt b/src/test/kotlin/integration/Comment articles routes.kt
index 6c7c00e..517b04c 100644
--- a/src/test/kotlin/integration/Comment articles routes.kt	
+++ b/src/test/kotlin/integration/Comment articles routes.kt	
@@ -1,9 +1,11 @@
 package integration
 
 import fr.dcproject.component.citizen.database.CitizenI.Name
+import integration.steps.`when`.Validate.ALL
+import integration.steps.`when`.Validate.REQUEST_BODY
+import integration.steps.`when`.Validate.REQUEST_PARAM
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a POST request`
-import integration.steps.`when`.`When I send a PUT request`
 import integration.steps.`when`.`with body`
 import integration.steps.given.`Given I have article`
 import integration.steps.given.`Given I have citizen`
@@ -13,6 +15,7 @@ import integration.steps.then.`And the response should contain`
 import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Created
 import io.ktor.http.HttpStatusCode.Companion.OK
 import org.junit.jupiter.api.Tag
@@ -33,14 +36,37 @@ class `Comment articles routes` : BaseTest() {
                 `with body`(
                     """
                     {
-                      "content": "Hello mister"
+                      "content": "Hello mister MARABOUTCHA"
                     }
                     """
                 )
             } `Then the response should be` Created and {
                 `And the response should not be null`()
                 `And the response should contain`("$.target.id", "aa16c635-28da-46f0-9a89-934eef88c7ca")
-                `And the response should contain`("$.content", "Hello mister")
+                `And the response should contain`("$.content", "Hello mister MARABOUTCHA")
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot comment article with bad request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Michael", "Faraday")
+            `Given I have article`(id = "aa16c635-28da-46f0-9a89-934eef88c7ca")
+            `When I send a POST request`("/articles/aa16c635-28da-46f0-9a89-934eef88c7ca/comments", ALL - REQUEST_BODY) {
+                `authenticated as`("Michael", "Faraday")
+                `with body`(
+                    """
+                    {
+                      "content": "To small content"
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".content")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 20 characters")
             }
         }
     }
@@ -52,7 +78,7 @@ class `Comment articles routes` : BaseTest() {
             `Given I have citizen`("Enrico", "Fermi")
             `Given I have article`(id = "6166c078-ca97-4366-b0aa-2a5cd558c78a")
             `Given I have comment on article`(article = "6166c078-ca97-4366-b0aa-2a5cd558c78a", createdBy = Name("Enrico", "Fermi"))
-            `When I send a GET request`("/articles/6166c078-ca97-4366-b0aa-2a5cd558c78a/comments") {
+            `When I send a GET request`("/articles/6166c078-ca97-4366-b0aa-2a5cd558c78a/comments?page=1&limit=40&sort=votes") {
                 `authenticated as`("Enrico", "Fermi")
             } `Then the response should be` OK and {
                 `And the response should not be null`()
@@ -61,6 +87,23 @@ class `Comment articles routes` : BaseTest() {
         }
     }
 
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get all comment on article with wrong parameters`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Enrico", "Fermi")
+            `Given I have article`(id = "6166c078-ca97-4366-b0aa-2a5cd558c78a")
+            `Given I have comment on article`(article = "6166c078-ca97-4366-b0aa-2a5cd558c78a", createdBy = Name("Enrico", "Fermi"))
+            `When I send a GET request`("/articles/6166c078-ca97-4366-b0aa-2a5cd558c78a/comments?page=1&limit=40&sort=wrong", ALL - REQUEST_PARAM) {
+                `authenticated as`("Enrico", "Fermi")
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[*].name", ".sort")
+                `And the response should contain`("$.invalidParams[*].reason", "must be one of: 'votes', 'createdAt'")
+            }
+        }
+    }
+
     /* TODO add votes */
     @Test
     fun `I can get all comment on article sorted by votes`() {
@@ -93,45 +136,4 @@ class `Comment articles routes` : BaseTest() {
             }
         }
     }
-
-    @Test
-    fun `I can edit comment`() {
-        withIntegrationApplication {
-            `Given I have citizen`("Hubert", "Reeves")
-            `Given I have article`(id = "bb05e4a3-55a1-4088-85e7-8d8c23be29b1")
-            `Given I have comment on article`(article = "bb05e4a3-55a1-4088-85e7-8d8c23be29b1", createdBy = Name("Hubert", "Reeves"), id = "fd30d20f-656c-42c6-8955-f61c04537464")
-            `When I send a PUT request`("/comments/fd30d20f-656c-42c6-8955-f61c04537464") {
-                `authenticated as`("Hubert", "Reeves")
-                `with body`(
-                    """
-                    {
-                      "content": "Hello boy"
-                    }
-                    """
-                )
-            } `Then the response should be` OK and {
-                `And the response should not be null`()
-                `And the response should contain`("$.content", "Hello boy")
-            }
-        }
-    }
-
-    @Test
-    fun `I can get comment by its ID`() {
-        withIntegrationApplication {
-            `Given I have citizen`("Alfred", "Kastler")
-            `Given I have article`(id = "3897465b-19d2-43a0-86ea-1e29dbb11ec9")
-            `Given I have comment on article`(
-                article = "3897465b-19d2-43a0-86ea-1e29dbb11ec9",
-                createdBy = Name("Alfred", "Kastler"),
-                id = "edd296a8-fc7a-4717-a2bb-9f035ceca3c2",
-                content = "Hello boy"
-            )
-            `When I send a GET request`("/comments/edd296a8-fc7a-4717-a2bb-9f035ceca3c2") {
-            } `Then the response should be` OK and {
-                `And the response should not be null`()
-                `And the response should contain`("$.content", "Hello boy")
-            }
-        }
-    }
 }
diff --git a/src/test/kotlin/integration/Comment constitutions routes.kt b/src/test/kotlin/integration/Comment constitutions routes.kt
index a999082..523a0be 100644
--- a/src/test/kotlin/integration/Comment constitutions routes.kt	
+++ b/src/test/kotlin/integration/Comment constitutions routes.kt	
@@ -1,6 +1,9 @@
 package integration
 
 import fr.dcproject.component.citizen.database.CitizenI.Name
+import integration.steps.`when`.Validate
+import integration.steps.`when`.Validate.ALL
+import integration.steps.`when`.Validate.REQUEST_BODY
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a POST request`
 import integration.steps.`when`.`with body`
@@ -13,6 +16,7 @@ import integration.steps.then.`And the response should contain`
 import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Created
 import io.ktor.http.HttpStatusCode.Companion.OK
 import org.junit.jupiter.api.Tag
@@ -33,12 +37,69 @@ class `Comment constitutions routes` : BaseTest() {
                 `with body`(
                     """
                     {
-                      "content": "Hello mister"
+                      "content": "Hello mister MARABOUTCHA"
                     }
                     """
                 )
             } `Then the response should be` Created and {
                 `And the response should not be null`()
+                `And the response should contain`("$.target.id", "1707c287-a472-4a62-89f2-9e85030e915c")
+                `And the response should contain`("$.content", "Hello mister MARABOUTCHA")
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot comment constitution with bad request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Nicolas", "Copernic")
+            `Given I have constitution`(id = "aa16c635-28da-46f0-9a89-934eef88c7ca")
+            `When I send a POST request`("/constitutions/aa16c635-28da-46f0-9a89-934eef88c7ca/comments", ALL - REQUEST_BODY) {
+                `authenticated as`("Nicolas", "Copernic")
+                `with body`(
+                    """
+                    {
+                      "content": "To small content"
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".content")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 20 characters")
+            }
+        }
+    }
+
+    @Test
+    fun `I can get all comment on constitution`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Enrico", "Fermi")
+            `Given I have constitution`(id = "6166c078-ca97-4366-b0aa-2a5cd558c78a")
+            `Given I have comment on constitution`(constitution = "6166c078-ca97-4366-b0aa-2a5cd558c78a", createdBy = Name("Enrico", "Fermi"))
+            `When I send a GET request`("/constitutions/6166c078-ca97-4366-b0aa-2a5cd558c78a/comments?page=1&limit=40&sort=votes") {
+                `authenticated as`("Enrico", "Fermi")
+            } `Then the response should be` OK and {
+                `And the response should not be null`()
+                `And the response should contain`("$.result[0].target.id", "6166c078-ca97-4366-b0aa-2a5cd558c78a")
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get all comment on constitution with wrong parameters`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Enrico", "Fermi")
+            `Given I have constitution`(id = "6166c078-ca97-4366-b0aa-2a5cd558c78a")
+            `Given I have comment on constitution`(constitution = "6166c078-ca97-4366-b0aa-2a5cd558c78a", createdBy = Name("Enrico", "Fermi"))
+            `When I send a GET request`("/constitutions/6166c078-ca97-4366-b0aa-2a5cd558c78a/comments?page=1&limit=40&sort=wrong", ALL - Validate.REQUEST_PARAM) {
+                `authenticated as`("Enrico", "Fermi")
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[*].name", ".sort")
+                `And the response should contain`("$.invalidParams[*].reason", "must be one of: 'votes', 'createdAt'")
             }
         }
     }
diff --git a/src/test/kotlin/integration/Comment routes.kt b/src/test/kotlin/integration/Comment routes.kt
index 1a1143e..ad7cea7 100644
--- a/src/test/kotlin/integration/Comment routes.kt	
+++ b/src/test/kotlin/integration/Comment routes.kt	
@@ -1,13 +1,23 @@
 package integration
 
+import fr.dcproject.component.citizen.database.CitizenI
+import integration.steps.`when`.Validate.ALL
+import integration.steps.`when`.Validate.REQUEST_BODY
 import integration.steps.`when`.`When I send a GET request`
+import integration.steps.`when`.`When I send a POST request`
+import integration.steps.`when`.`When I send a PUT request`
+import integration.steps.`when`.`with body`
 import integration.steps.given.`Given I have article`
 import integration.steps.given.`Given I have citizen`
 import integration.steps.given.`Given I have comment on article`
+import integration.steps.given.`Given I have comment on comment`
 import integration.steps.given.`authenticated as`
+import integration.steps.then.`And the response should contain`
 import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.BadRequest
+import io.ktor.http.HttpStatusCode.Companion.Created
 import io.ktor.http.HttpStatusCode.Companion.OK
 import org.junit.jupiter.api.Tag
 import org.junit.jupiter.api.Tags
@@ -30,4 +40,126 @@ class `Comment routes` : BaseTest() {
             }
         }
     }
+
+    @Test
+    fun `I can create comment`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Hubert", "Reeves")
+            `Given I have comment on comment`(id = "49933147-fc0f-4e5c-aa8d-f77fa0d88fa6")
+            `When I send a POST request`("/comments/49933147-fc0f-4e5c-aa8d-f77fa0d88fa6") {
+                `authenticated as`("Hubert", "Reeves")
+                `with body`(
+                    """
+                    {
+                      "content": "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
+                    }
+                    """
+                )
+            } `Then the response should be` Created and {
+                `And the response should not be null`()
+                `And the response should contain`("$.content", "Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot create comment with bad request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Hubert", "Reeves")
+            `Given I have comment on comment`(id = "49933147-fc0f-4e5c-aa8d-f77fa0d88fa6")
+            `When I send a POST request`("/comments/49933147-fc0f-4e5c-aa8d-f77fa0d88fa6", ALL - REQUEST_BODY) {
+                `authenticated as`("Hubert", "Reeves")
+                `with body`(
+                    """
+                    {
+                      "content": "small content"
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".content")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 20 characters")
+            }
+        }
+    }
+
+    @Test
+    fun `I can edit comment`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Hubert", "Reeves")
+            `Given I have article`(id = "bb05e4a3-55a1-4088-85e7-8d8c23be29b1")
+            `Given I have comment on article`(
+                article = "bb05e4a3-55a1-4088-85e7-8d8c23be29b1",
+                createdBy = CitizenI.Name(
+                    "Hubert",
+                    "Reeves"
+                ),
+                id = "fd30d20f-656c-42c6-8955-f61c04537464"
+            )
+            `When I send a PUT request`("/comments/fd30d20f-656c-42c6-8955-f61c04537464") {
+                `authenticated as`("Hubert", "Reeves")
+                `with body`(
+                    """
+                    {
+                      "content": "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
+                    }
+                    """
+                )
+            } `Then the response should be` OK and {
+                `And the response should not be null`()
+                `And the response should contain`("$.content", "Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
+            }
+        }
+    }
+
+    @Test
+    fun `I cannot edit comment with bad request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Hubert", "Reeves")
+            `Given I have article`(id = "bb05e4a3-55a1-4088-85e7-8d8c23be29b1")
+            `Given I have comment on article`(
+                article = "bb05e4a3-55a1-4088-85e7-8d8c23be29b1",
+                createdBy = CitizenI.Name(
+                    "Hubert",
+                    "Reeves"
+                ),
+                id = "fd30d20f-656c-42c6-8955-f61c04537464"
+            )
+            `When I send a PUT request`("/comments/fd30d20f-656c-42c6-8955-f61c04537464", ALL - REQUEST_BODY) {
+                `authenticated as`("Hubert", "Reeves")
+                `with body`(
+                    """
+                    {
+                      "content": "small content"
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".content")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 20 characters")
+            }
+        }
+    }
+
+    @Test
+    fun `I can get comment by its ID`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Alfred", "Kastler")
+            `Given I have article`(id = "3897465b-19d2-43a0-86ea-1e29dbb11ec9")
+            `Given I have comment on article`(
+                article = "3897465b-19d2-43a0-86ea-1e29dbb11ec9",
+                createdBy = CitizenI.Name("Alfred", "Kastler"),
+                id = "edd296a8-fc7a-4717-a2bb-9f035ceca3c2",
+                content = "Hello boy"
+            )
+            `When I send a GET request`("/comments/edd296a8-fc7a-4717-a2bb-9f035ceca3c2") {
+            } `Then the response should be` OK and {
+                `And the response should not be null`()
+                `And the response should contain`("$.content", "Hello boy")
+            }
+        }
+    }
 }
diff --git a/src/test/kotlin/integration/Constitution routes.kt b/src/test/kotlin/integration/Constitution routes.kt
index 01de75b..271ca52 100644
--- a/src/test/kotlin/integration/Constitution routes.kt	
+++ b/src/test/kotlin/integration/Constitution routes.kt	
@@ -1,6 +1,8 @@
 package integration
 
-import integration.steps.`when`.Validate
+import integration.steps.`when`.Validate.ALL
+import integration.steps.`when`.Validate.REQUEST_BODY
+import integration.steps.`when`.Validate.REQUEST_PARAM
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a POST request`
 import integration.steps.`when`.`with body`
@@ -9,9 +11,10 @@ import integration.steps.given.`Given I have constitution`
 import integration.steps.given.`Given I have constitutions`
 import integration.steps.given.`authenticated as`
 import integration.steps.then.`And have property`
+import integration.steps.then.`And the response should contain`
 import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
-import integration.steps.then.`whish contains`
+import integration.steps.then.`which contains`
 import integration.steps.then.and
 import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Created
@@ -28,12 +31,25 @@ class `Constitution routes` : BaseTest() {
     fun `I can get constitution list`() {
         withIntegrationApplication {
             `Given I have constitutions`(3)
-            `When I send a GET request`("/constitutions") `Then the response should be` OK and {
+            `When I send a GET request`("/constitutions?page=1&limit=10&sort=title&direction=desc") `Then the response should be` OK and {
                 `And the response should not be null`()
             }
         }
     }
 
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get constitution list with wrong request`() {
+        withIntegrationApplication {
+            `Given I have constitutions`(3)
+            `When I send a GET request`("/constitutions?page=1&limit=5000&sort=title&direction=desc", ALL - REQUEST_PARAM) `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".limit")
+                `And the response should contain`("$.invalidParams[0].reason", "must be at most '50'")
+            }
+        }
+    }
+
     @Test
     fun `I can get constitution by ID`() {
         withIntegrationApplication {
@@ -41,7 +57,7 @@ class `Constitution routes` : BaseTest() {
             `Given I have constitution`("0321c8d1-4ce3-4763-b5f4-a92611d280b4")
             `When I send a GET request`("/constitutions/0321c8d1-4ce3-4763-b5f4-a92611d280b4") `Then the response should be` OK and {
                 `And the response should not be null`()
-                `And have property`("$.id") `whish contains` "0321c8d1-4ce3-4763-b5f4-a92611d280b4"
+                `And have property`("$.id") `which contains` "0321c8d1-4ce3-4763-b5f4-a92611d280b4"
             }
         }
     }
@@ -70,11 +86,11 @@ class `Constitution routes` : BaseTest() {
                     """
                     {
                        "versionId":"15814bb6-8d90-4c6a-a456-c3939a8ec75e",
-                       "title":"Hello world!",
+                       "title":"Cras sit amet sapien mattis nulla rutrum blandit.",
                        "anonymous":true,
                        "titles":[
                           {
-                             "name":"plop"
+                             "name":"Cras sit amet sapien mattis nulla rutrum blandit."
                           }
                        ]
                     }
@@ -82,17 +98,18 @@ class `Constitution routes` : BaseTest() {
                 )
             } `Then the response should be` Created and {
                 `And the response should not be null`()
-                `And have property`("$.versionId") `whish contains` "15814bb6-8d90-4c6a-a456-c3939a8ec75e"
-                `And have property`("$.title") `whish contains` "Hello world!"
+                `And have property`("$.versionId") `which contains` "15814bb6-8d90-4c6a-a456-c3939a8ec75e"
+                `And have property`("$.title") `which contains` "Cras sit amet sapien mattis nulla rutrum blandit."
             }
         }
     }
 
     @Test
+    @Tag("BadRequest")
     fun `I cannot create an constitution if bad request`() {
         withIntegrationApplication {
             `Given I have citizen`("Henri", "Poincaré")
-            `When I send a POST request`("/constitutions", Validate.ALL - Validate.REQUEST_BODY) {
+            `When I send a POST request`("/constitutions", ALL - REQUEST_BODY) {
                 `authenticated as`("Henri", "Poincaré")
                 `with body`(
                     """
@@ -112,4 +129,34 @@ class `Constitution routes` : BaseTest() {
             } `Then the response should be` BadRequest
         }
     }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot create an constitution if request is not valid`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Henri", "Poincaré")
+            `When I send a POST request`("/constitutions", ALL - REQUEST_BODY) {
+                `authenticated as`("Henri", "Poincaré")
+                `with body`(
+                    """
+                    {
+                       "versionId":"15814bb6-8d90-4c6a-a456-c3939a8ec75e",
+                       "title":"too small",
+                       "anonymous":true,
+                       "titles":[
+                          {
+                             "name":"too small"
+                          }
+                       ]
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should contain`("$.invalidParams[0].name", ".title")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 10 characters")
+                `And the response should contain`("$.invalidParams[1].name", ".titles[0].name")
+                `And the response should contain`("$.invalidParams[1].reason", "must have at least 10 characters")
+            }
+        }
+    }
 }
diff --git a/src/test/kotlin/integration/Login routes.kt b/src/test/kotlin/integration/Login routes.kt
index 7336f9b..131b278 100644
--- a/src/test/kotlin/integration/Login routes.kt	
+++ b/src/test/kotlin/integration/Login routes.kt	
@@ -27,7 +27,7 @@ class `Login routes` : BaseTest() {
                     """
                     {
                       "username": "niels-bohr",
-                      "password": "azerty"
+                      "password": "Azerty123!"
                     }
                     """
                 )
diff --git a/src/test/kotlin/integration/Notification routes.kt b/src/test/kotlin/integration/Notification routes.kt
new file mode 100644
index 0000000..d50b298
--- /dev/null
+++ b/src/test/kotlin/integration/Notification routes.kt	
@@ -0,0 +1,78 @@
+package integration
+
+import fr.dcproject.common.utils.toUUID
+import fr.dcproject.component.article.database.ArticleForView
+import fr.dcproject.component.auth.database.UserCreator
+import fr.dcproject.component.citizen.database.CitizenCreator
+import fr.dcproject.component.citizen.database.CitizenI.Name
+import fr.dcproject.component.notification.ArticleUpdateNotification
+import fr.dcproject.component.notification.Notification
+import fr.dcproject.component.notification.Publisher
+import integration.steps.given.`Given I have article`
+import integration.steps.given.`Given I have citizen`
+import integration.steps.given.`Given I have follow on article`
+import integration.steps.given.`authenticated in url as`
+import io.ktor.http.cio.websocket.Frame
+import io.ktor.http.cio.websocket.readText
+import kotlinx.coroutines.launch
+import org.junit.jupiter.api.Tag
+import org.junit.jupiter.api.Tags
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.koin.test.get
+import kotlin.test.assertEquals
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+@Tags(Tag("integration"), Tag("notification"))
+class `Notification routes` : BaseTest() {
+    @Test
+    fun `I can send notification`() {
+        withIntegrationApplication {
+            `Given I have citizen`("John", "Doe", id = "1a34191a-9cde-45ba-8ac1-230138a102d3")
+            `Given I have article`(id = "a06cbfb7-3094-4d64-aaa1-7486c0c292f4", createdBy = Name(firstName = "John", lastName = "Doe"))
+            `Given I have follow on article`("John", "Doe", article = "a06cbfb7-3094-4d64-aaa1-7486c0c292f4")
+            val notification = ArticleUpdateNotification(
+                ArticleForView(
+                    id = "a06cbfb7-3094-4d64-aaa1-7486c0c292f4".toUUID(),
+                    title = "MyTitle",
+                    content = "myContent",
+                    description = "myDescription",
+                    createdBy = CitizenCreator(
+                        id = "1a34191a-9cde-45ba-8ac1-230138a102d3".toUUID(),
+                        name = Name(firstName = "John", lastName = "Doe"),
+                        email = "john-doe@plop.com",
+                        user = UserCreator(username = "john-doe"),
+                    )
+                )
+            )
+            val publisher = get<Publisher>()
+            launch {
+                publisher
+                    .publish(notification)
+                    .await()
+            }
+
+            Thread.sleep(1000)
+
+            handleWebSocketConversation(
+                "/notifications",
+                {
+                    `authenticated in url as`("John", "Doe")
+                }
+            ) { incoming, outgoing ->
+                incoming.receive().let {
+                    when (it) {
+                        is Frame.Text -> Notification.fromString<ArticleUpdateNotification>(it.readText()).let { notif ->
+                            assertEquals(
+                                "a06cbfb7-3094-4d64-aaa1-7486c0c292f4",
+                                notif.target.id.toString()
+                            )
+                            outgoing.send(it)
+                        }
+                        else -> error(it.toString())
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/src/test/kotlin/integration/Opinion routes.kt b/src/test/kotlin/integration/Opinion routes.kt
index 4613372..14e8d13 100644
--- a/src/test/kotlin/integration/Opinion routes.kt	
+++ b/src/test/kotlin/integration/Opinion routes.kt	
@@ -1,6 +1,8 @@
 package integration
 
 import fr.dcproject.component.citizen.database.CitizenI.Name
+import integration.steps.`when`.Validate.ALL
+import integration.steps.`when`.Validate.REQUEST_PARAM
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a PUT request`
 import integration.steps.`when`.`with body`
@@ -11,8 +13,10 @@ import integration.steps.given.`Given I have opinion on article`
 import integration.steps.given.`authenticated as`
 import integration.steps.then.`And the response should contain list`
 import integration.steps.then.`And the response should contain`
+import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode
 import io.ktor.http.HttpStatusCode.Companion.Created
 import io.ktor.http.HttpStatusCode.Companion.OK
 import org.junit.jupiter.api.Tag
@@ -133,7 +137,7 @@ class `Opinion routes` : BaseTest() {
                 article = "8651b530-ac1b-4214-a784-706781371074",
                 Name("Albert", "Einstein")
             )
-            `When I send a GET request`("/citizens/c1542096-3431-432d-8e35-9dc071d4c818/opinions/articles") {
+            `When I send a GET request`("/citizens/c1542096-3431-432d-8e35-9dc071d4c818/opinions/articles?page=1&limit=10") {
                 `authenticated as`("Albert", "Einstein")
             } `Then the response should be` OK and {
                 `And the response should contain`("$.result[0].name", "Opinion9")
@@ -141,4 +145,26 @@ class `Opinion routes` : BaseTest() {
             }
         }
     }
+
+    @Test
+    @Tags(Tag("article"), Tag("BadRequest"))
+    fun `I cannot get all my opinion of one article with wrong request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Albert", "Einstein", id = "c1542096-3431-432d-8e35-9dc071d4c818")
+            `Given I have an opinion choice`("Opinion9")
+            `Given I have article`("8651b530-ac1b-4214-a784-706781371074")
+            `Given I have opinion on article`(
+                "Opinion9",
+                article = "8651b530-ac1b-4214-a784-706781371074",
+                Name("Albert", "Einstein")
+            )
+            `When I send a GET request`("/citizens/c1542096-3431-432d-8e35-9dc071d4c818/opinions/articles?page=1&limit=60", ALL - REQUEST_PARAM) {
+                `authenticated as`("Albert", "Einstein")
+            } `Then the response should be` HttpStatusCode.BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".limit")
+                `And the response should contain`("$.invalidParams[0].reason", "must be at most '50'")
+            }
+        }
+    }
 }
diff --git a/src/test/kotlin/integration/Register routes.kt b/src/test/kotlin/integration/Register routes.kt
index 52c4ae5..510d0b2 100644
--- a/src/test/kotlin/integration/Register routes.kt	
+++ b/src/test/kotlin/integration/Register routes.kt	
@@ -29,7 +29,7 @@ class `Register routes` : BaseTest() {
                       "birthday": "2001-01-01",
                       "user":{
                         "username": "george-junior",
-                        "password": "azerty"
+                        "password": "Azerty123!"
                       },
                       "email": "george-junior@gmail.com"
                     }
diff --git a/src/test/kotlin/integration/Vote routes.kt b/src/test/kotlin/integration/Vote routes.kt
index ec734b8..a01aaf7 100644
--- a/src/test/kotlin/integration/Vote routes.kt	
+++ b/src/test/kotlin/integration/Vote routes.kt	
@@ -1,6 +1,9 @@
 package integration
 
 import fr.dcproject.component.citizen.database.CitizenI.Name
+import integration.steps.`when`.Validate.ALL
+import integration.steps.`when`.Validate.REQUEST_BODY
+import integration.steps.`when`.Validate.REQUEST_PARAM
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a PUT request`
 import integration.steps.`when`.`with body`
@@ -12,51 +15,133 @@ import integration.steps.given.`Given I have vote +1 on article`
 import integration.steps.given.`Given I have vote -1 on article`
 import integration.steps.given.`authenticated as`
 import integration.steps.then.`And the response should contain`
+import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Created
 import io.ktor.http.HttpStatusCode.Companion.OK
+import org.junit.jupiter.api.DynamicTest
 import org.junit.jupiter.api.Tag
 import org.junit.jupiter.api.Tags
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestFactory
 import org.junit.jupiter.api.TestInstance
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 @Tags(Tag("integration"), Tag("vote"))
 class `Vote routes` : BaseTest() {
-    @Test
-    fun `I can vote article`() {
+    @TestFactory
+    fun `I can vote article`(): List<DynamicTest> {
         withIntegrationApplication {
             `Given I have citizen`("Thalès", "Milet")
             `Given I have article`(id = "835c5101-ca39-4038-a4e6-da6ee62ca6d5")
-            `When I send a PUT request`("/articles/835c5101-ca39-4038-a4e6-da6ee62ca6d5/vote") {
-                `authenticated as`("Thalès", "Milet")
-                `with body`(
-                    """
-                    {
-                      "note": 1
-                    }
-                    """
-                )
-            } `Then the response should be` Created
+        }
+        return (-1..1).map { note ->
+            DynamicTest.dynamicTest("""I can vote article with note "$note"""") {
+                withIntegrationApplication {
+                    `When I send a PUT request`("/articles/835c5101-ca39-4038-a4e6-da6ee62ca6d5/vote") {
+                        `authenticated as`("Thalès", "Milet")
+                        `with body`(
+                            """
+                            {
+                              "note": $note
+                            }
+                            """
+                        )
+                    } `Then the response should be` Created
+                }
+            }
         }
     }
 
-    @Test
-    fun `I can vote constitution`() {
+    @TestFactory
+    @Tag("BadRequest")
+    fun `I cannot vote article with wrong request`(): List<DynamicTest> {
+        withIntegrationApplication {
+            `Given I have citizen`("Thalès", "Milet")
+            `Given I have article`(id = "835c5101-ca39-4038-a4e6-da6ee62ca6d5")
+        }
+
+        return listOf(-10, -2, +2, +10).map { note ->
+            DynamicTest.dynamicTest("""I can vote article with note "$note"""") {
+                withIntegrationApplication {
+                    `When I send a PUT request`(
+                        "/articles/835c5101-ca39-4038-a4e6-da6ee62ca6d5/vote",
+                        ALL - REQUEST_BODY
+                    ) {
+                        `authenticated as`("Thalès", "Milet")
+                        `with body`(
+                            """
+                    {
+                      "note": $note
+                    }
+                    """
+                        )
+                    } `Then the response should be` BadRequest and {
+                        `And the response should not be null`()
+                        `And the response should contain`("$.invalidParams[0].name", ".note")
+                        `And the response should contain`("$.invalidParams[0].reason", if (note > 0) "must be at most '1'" else "must be at least '-1'")
+                    }
+                }
+            }
+        }
+    }
+
+    @TestFactory
+    fun `I can vote constitution`(): List<DynamicTest> {
         withIntegrationApplication {
             `Given I have citizen`("Gregor", "Mendel")
             `Given I have constitution`(id = "76e79c89-efc1-492d-9e8f-dc9717363a11")
-            `When I send a PUT request`("/constitutions/76e79c89-efc1-492d-9e8f-dc9717363a11/vote") {
-                `authenticated as`("Gregor", "Mendel")
-                `with body`(
-                    """
-                    {
-                      "note": 1
+        }
+        return (-1..1).map { note ->
+            DynamicTest.dynamicTest("""I can vote constitution with note "$note"""") {
+                withIntegrationApplication {
+                    `When I send a PUT request`("/constitutions/76e79c89-efc1-492d-9e8f-dc9717363a11/vote") {
+                        `authenticated as`("Gregor", "Mendel")
+                        `with body`(
+                            """
+                            {
+                              "note": $note
+                            }²
+                            """
+                        )
+                    } `Then the response should be` Created
+                }
+            }
+        }
+    }
+
+    @TestFactory
+    @Tag("BadRequest")
+    fun `I cannot vote constitution with wrong request`(): List<DynamicTest> {
+        withIntegrationApplication {
+            `Given I have citizen`("Gregor", "Mendel")
+            `Given I have constitution`(id = "76e79c89-efc1-492d-9e8f-dc9717363a11")
+        }
+
+        return listOf(-10, -2, +2, +10).map { note ->
+            DynamicTest.dynamicTest("""I can vote constitution with note "$note"""") {
+                withIntegrationApplication {
+                    `When I send a PUT request`(
+                        "/constitutions/76e79c89-efc1-492d-9e8f-dc9717363a11/vote",
+                        ALL - REQUEST_BODY
+                    ) {
+                        `authenticated as`("Gregor", "Mendel")
+                        `with body`(
+                            """
+                            {
+                              "note": $note
+                            }
+                            """
+                        )
+                    } `Then the response should be` BadRequest and {
+                        `And the response should not be null`()
+                        `And the response should contain`("$.invalidParams[0].name", ".note")
+                        `And the response should contain`("$.invalidParams[0].reason", if (note > 0) "must be at most '1'" else "must be at least '-1'")
                     }
-                    """
-                )
-            } `Then the response should be` Created
+                }
+            }
         }
     }
 
@@ -66,7 +151,7 @@ class `Vote routes` : BaseTest() {
             `Given I have citizen`("Carl", "Gauss", id = "c044823d-e778-4256-9016-b1334bf933d3")
             `Given I have article`("7c9286db-470d-448c-aab1-3f0b072213b1")
             `Given I have vote +1 on article`("7c9286db-470d-448c-aab1-3f0b072213b1", Name("Carl", "Gauss"))
-            `When I send a GET request`("/citizens/c044823d-e778-4256-9016-b1334bf933d3/votes/articles") {
+            `When I send a GET request`("/citizens/c044823d-e778-4256-9016-b1334bf933d3/votes/articles?page=1&limit=50") {
                 `authenticated as`("Carl", "Gauss")
             } `Then the response should be` OK and {
                 `And the response should contain`("$.currentPage", 1)
@@ -77,6 +162,23 @@ class `Vote routes` : BaseTest() {
         }
     }
 
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot get votes of current citizen with wrong request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Carl", "Gauss", id = "c044823d-e778-4256-9016-b1334bf933d3")
+            `Given I have article`("7c9286db-470d-448c-aab1-3f0b072213b1")
+            `Given I have vote +1 on article`("7c9286db-470d-448c-aab1-3f0b072213b1", Name("Carl", "Gauss"))
+            `When I send a GET request`("/citizens/c044823d-e778-4256-9016-b1334bf933d3/votes/articles?page=1&limit=60", ALL - REQUEST_PARAM) {
+                `authenticated as`("Carl", "Gauss")
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".limit")
+                `And the response should contain`("$.invalidParams[0].reason", "must be at most '50'")
+            }
+        }
+    }
+
     @Test
     fun `I can get votes of current citizen by target ids`() {
         withIntegrationApplication {
@@ -118,4 +220,39 @@ class `Vote routes` : BaseTest() {
             }
         }
     }
+
+    @TestFactory
+    @Tag("BadRequest")
+    fun `I cannot vote comment with wrong request`(): List<DynamicTest> {
+        withIntegrationApplication {
+            `Given I have citizen`("Antoine", "Lavoisier")
+            `Given I have article`(id = "835c5101-ca39-4038-a4e6-da6ee62ca6d5")
+            `Given I have comment on article`(
+                createdBy = Name("Antoine", "Lavoisier"),
+                article = "835c5101-ca39-4038-a4e6-da6ee62ca6d5",
+                id = "e793eccc-456b-4450-a292-46d592229b74",
+            )
+        }
+
+        return listOf(-10, -2, +2, +10).map { note ->
+            DynamicTest.dynamicTest("""I can vote comment with note "$note"""") {
+                withIntegrationApplication {
+                    `When I send a PUT request`("/comments/e793eccc-456b-4450-a292-46d592229b74/vote", ALL - REQUEST_BODY) {
+                        `authenticated as`("Antoine", "Lavoisier")
+                        `with body`(
+                            """
+                            {
+                              "note": $note
+                            }
+                            """
+                        )
+                    } `Then the response should be` BadRequest and {
+                        `And the response should not be null`()
+                        `And the response should contain`("$.invalidParams[0].name", ".note")
+                        `And the response should contain`("$.invalidParams[0].reason", if (note > 0) "must be at most '1'" else "must be at least '-1'")
+                    }
+                }
+            }
+        }
+    }
 }
diff --git a/src/test/kotlin/integration/Workgroup Members routes.kt b/src/test/kotlin/integration/Workgroup Members routes.kt
new file mode 100644
index 0000000..49034b0
--- /dev/null
+++ b/src/test/kotlin/integration/Workgroup Members routes.kt	
@@ -0,0 +1,118 @@
+package integration
+
+import fr.dcproject.component.citizen.database.CitizenI.Name
+import integration.steps.`when`.`When I send a DELETE request`
+import integration.steps.`when`.`When I send a POST request`
+import integration.steps.`when`.`When I send a PUT request`
+import integration.steps.`when`.`with body`
+import integration.steps.given.`Given I have citizen`
+import integration.steps.given.`Given I have workgroup`
+import integration.steps.given.`With members`
+import integration.steps.given.`authenticated as`
+import integration.steps.then.`And the response should contain list`
+import integration.steps.then.`And the response should contain`
+import integration.steps.then.`Then the response should be`
+import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.Created
+import io.ktor.http.HttpStatusCode.Companion.OK
+import org.junit.jupiter.api.Tag
+import org.junit.jupiter.api.Tags
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+@Tags(Tag("integration"), Tag("workgroup"), Tag("workgroupMember"))
+class `Workgroup Members routes` : BaseTest() {
+    @Test
+    fun `I can add member to workgroup`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Blaise", "Pascal")
+            `Given I have citizen`("Roger", "Penrose", id = "6d883fe7-5fc0-4a50-8858-72230673eba4")
+            `Given I have citizen`("Alessandro", "Volta", id = "b5bac515-45d4-4aeb-9b6d-2627a0bbc419")
+            `Given I have workgroup`("b0ea1922-3bc6-44e2-aa7c-40158998cfbb", createdBy = Name("Blaise", "Pascal"))
+            `When I send a POST request`("/workgroups/b0ea1922-3bc6-44e2-aa7c-40158998cfbb/members") {
+                `authenticated as`("Blaise", "Pascal")
+                `with body`(
+                    """
+                    [
+                        {
+                            "citizen": {"id":"6d883fe7-5fc0-4a50-8858-72230673eba4"},
+                            "roles": ["MASTER"]
+                        },
+                        {
+                            "citizen": {"id":"b5bac515-45d4-4aeb-9b6d-2627a0bbc419"},
+                            "roles": ["MASTER"]
+                        }
+                    ]
+                    """
+                )
+            } `Then the response should be` Created
+        }
+    }
+
+    @Test
+    fun `I can remove member to workgroup`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Heinrich", "Hertz", id = "94f92424-c257-4582-907c-98564a8c4ac9")
+            `Given I have citizen`("William", "Thomson", id = "87909ba3-2069-431c-9924-219fd8411cf2")
+            `Given I have citizen`("Paul", "Dirac", id = "1baf48bb-02bc-4d8f-ac86-33335354f5e7")
+            `Given I have workgroup`("b6c975df-dd44-4e99-adc1-f605746b0e11", createdBy = Name("Heinrich", "Hertz")) {
+                `With members`(
+                    Name("William", "Thomson"),
+                    Name("Paul", "Dirac"),
+                )
+            }
+            `When I send a DELETE request`("/workgroups/b6c975df-dd44-4e99-adc1-f605746b0e11/members") {
+                `authenticated as`("Heinrich", "Hertz")
+                """
+                [
+                  {
+                    "citizen": {"id":"87909ba3-2069-431c-9924-219fd8411cf2"}
+                  }
+                ]
+                """
+            } `Then the response should be` OK and {
+                `And the response should contain list`("$", 2)
+                `And the response should contain`("$.[0]citizen.id", "94f92424-c257-4582-907c-98564a8c4ac9")
+                `And the response should contain`("$.[1]citizen.id", "1baf48bb-02bc-4d8f-ac86-33335354f5e7")
+            }
+        }
+    }
+
+    @Test
+    fun `I can update members on workgroup`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Leon", "Foucault")
+            `Given I have citizen`("Sadi", "Carnot", id = "be3b0926-8628-4426-804a-75188a6eb315")
+            `Given I have citizen`("Joseph", "Fourier", id = "b49e20c1-8393-45d6-a6a0-3fa5c71cbdc1")
+            `Given I have citizen`("Georg", "Ohm")
+            `Given I have workgroup`("784fe6bc-7635-4ae2-b080-3a4743b998bf", createdBy = Name("Leon", "Foucault")) {
+                `With members`(
+                    Name("Sadi", "Carnot"),
+                    Name("Joseph", "Fourier"),
+                )
+            }
+            `When I send a PUT request`("/workgroups/784fe6bc-7635-4ae2-b080-3a4743b998bf/members") {
+                `authenticated as`("Leon", "Foucault")
+                `with body`(
+                    """
+                    [
+                      {
+                        "citizen": {"id":"be3b0926-8628-4426-804a-75188a6eb315"},
+                        "roles": ["MASTER"]
+                      },
+                      {
+                        "citizen": {"id":"b49e20c1-8393-45d6-a6a0-3fa5c71cbdc1"},
+                        "roles": ["MASTER"]
+                      }
+                    ]
+                    """
+                )
+            } `Then the response should be` OK and {
+                `And the response should contain list`("$", 2)
+                `And the response should contain`("$.[0]citizen.id", "be3b0926-8628-4426-804a-75188a6eb315")
+                `And the response should contain`("$.[1]citizen.id", "b49e20c1-8393-45d6-a6a0-3fa5c71cbdc1")
+            }
+        }
+    }
+}
diff --git a/src/test/kotlin/integration/Workgroup routes.kt b/src/test/kotlin/integration/Workgroup routes.kt
index 32b69d7..6a7adfb 100644
--- a/src/test/kotlin/integration/Workgroup routes.kt	
+++ b/src/test/kotlin/integration/Workgroup routes.kt	
@@ -1,6 +1,8 @@
 package integration
 
 import fr.dcproject.component.citizen.database.CitizenI.Name
+import integration.steps.`when`.Validate.REQUEST_BODY
+import integration.steps.`when`.Validate.REQUEST_PARAM
 import integration.steps.`when`.`When I send a DELETE request`
 import integration.steps.`when`.`When I send a GET request`
 import integration.steps.`when`.`When I send a POST request`
@@ -15,8 +17,10 @@ import integration.steps.then.`And have property`
 import integration.steps.then.`And the response should be null`
 import integration.steps.then.`And the response should contain list`
 import integration.steps.then.`And the response should contain`
+import integration.steps.then.`And the response should not be null`
 import integration.steps.then.`Then the response should be`
 import integration.steps.then.and
+import io.ktor.http.HttpStatusCode.Companion.BadRequest
 import io.ktor.http.HttpStatusCode.Companion.Created
 import io.ktor.http.HttpStatusCode.Companion.NoContent
 import io.ktor.http.HttpStatusCode.Companion.NotFound
@@ -73,7 +77,7 @@ class `Workgroup routes` : BaseTest() {
                     {
                         "id":"f496d86d-6654-4068-91ff-90e1dbcc5f38",
                         "name":"Les Bouffons",
-                        "description":"La vie est belle",
+                        "description":"Pellentesque eleifend malesuada aliquam. Maecenas et urna quis nunc lacinia scelerisque.",
                         "anonymous":false
                     }
                     """
@@ -81,7 +85,7 @@ class `Workgroup routes` : BaseTest() {
             } `Then the response should be` Created and {
                 `And the response should contain`("$.id", "f496d86d-6654-4068-91ff-90e1dbcc5f38")
                 `And the response should contain`("$.name", "Les Bouffons")
-                `And the response should contain`("$.description", "La vie est belle")
+                `And the response should contain`("$.description", "Pellentesque eleifend malesuada aliquam. Maecenas et urna quis nunc lacinia scelerisque.")
                 `And the response should contain`("$.anonymous", false)
             }
 
@@ -91,6 +95,36 @@ class `Workgroup routes` : BaseTest() {
         }
     }
 
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot create a workgroup with wrong request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("Werner", "Heisenberg")
+            `When I send a POST request`("/workgroups") {
+                `authenticated as`("Werner", "Heisenberg")
+                `with body`(
+                    """
+                    {
+                        "id":"f496d86d-6654-4068-91ff-90e1dbcc5f38",
+                        "name":"sm",
+                        "description":"small",
+                        "anonymous":false,
+                        "logo": "www.plop.com"
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".name")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 5 characters")
+                `And the response should contain`("$.invalidParams[1].name", ".description")
+                `And the response should contain`("$.invalidParams[1].reason", "must have at least 50 characters")
+                `And the response should contain`("$.invalidParams[2].name", ".logo")
+                `And the response should contain`("$.invalidParams[2].reason", "is not url")
+            }
+        }
+    }
+
     @Test
     fun `I can edit a workgroup`() {
         withIntegrationApplication {
@@ -109,14 +143,15 @@ class `Workgroup routes` : BaseTest() {
                     """
                     {
                         "name":"La ratatouille",
-                        "description":"Une petite souris"
+                        "description":"Une petite souris avec un chapeau et qui aime la cuisine",
+                        "logo": "http://sdf@exemple.com/sdfsd?sdf=sss"
                     }
                     """
                 )
             } `Then the response should be` OK and {
                 `And the response should contain`("$.id", "aa875a24-0050-4252-9130-d37391714e26")
                 `And the response should contain`("$.name", "La ratatouille")
-                `And the response should contain`("$.description", "Une petite souris")
+                `And the response should contain`("$.description", "Une petite souris avec un chapeau et qui aime la cuisine")
 
                 `And have property`("$.members")
                 `And the response should contain list`("$.members", 3)
@@ -129,7 +164,43 @@ class `Workgroup routes` : BaseTest() {
             } `Then the response should be` OK and {
                 `And the response should contain`("$.id", "aa875a24-0050-4252-9130-d37391714e26")
                 `And the response should contain`("$.name", "La ratatouille")
-                `And the response should contain`("$.description", "Une petite souris")
+                `And the response should contain`("$.description", "Une petite souris avec un chapeau et qui aime la cuisine")
+            }
+        }
+    }
+
+    @Test
+    @Tag("BadRequest")
+    fun `I cannot edit a workgroup with bad request`() {
+        withIntegrationApplication {
+            `Given I have citizen`("John", "Wheeler")
+            `Given I have citizen`("Heinrich", "Hertz", id = "94f92424-c257-4582-907c-98564a8c4ac9")
+            `Given I have citizen`("William", "Thomson", id = "87909ba3-2069-431c-9924-219fd8411cf2")
+            `Given I have workgroup`("aa875a24-0050-4252-9130-d37391714e26", createdBy = Name("John", "Wheeler")) {
+                `With members`(
+                    Name("Heinrich", "Hertz"),
+                    Name("William", "Thomson"),
+                )
+            }
+            `When I send a PUT request`("/workgroups/aa875a24-0050-4252-9130-d37391714e26", -REQUEST_BODY) {
+                `authenticated as`("John", "Wheeler")
+                `with body`(
+                    """
+                    {
+                        "name":"sm",
+                        "description":"small2",
+                        "logo": "ws://sdfs.sdok"
+                    }
+                    """
+                )
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".name")
+                `And the response should contain`("$.invalidParams[0].reason", "must have at least 5 characters")
+                `And the response should contain`("$.invalidParams[1].name", ".description")
+                `And the response should contain`("$.invalidParams[1].reason", "must have at least 50 characters")
+                `And the response should contain`("$.invalidParams[2].name", ".logo")
+                `And the response should contain`("$.invalidParams[2].reason", "is not url")
             }
         }
     }
@@ -157,7 +228,7 @@ class `Workgroup routes` : BaseTest() {
         withIntegrationApplication {
             `Given I have citizen`("Max", "Planck")
             `Given I have workgroup`("3fd8edb6-c4b4-4c94-bc75-ddd9b290d32c")
-            `When I send a GET request`("/workgroups") {
+            `When I send a GET request`("/workgroups?page=1&limit=10&sort=createdAt") {
                 `authenticated as`("Max", "Planck")
                 `with no content`()
             } `Then the response should be` OK and {
@@ -167,94 +238,15 @@ class `Workgroup routes` : BaseTest() {
     }
 
     @Test
-    fun `I can add member to workgroup`() {
+    @Tag("BadRequest")
+    fun `I cannot get workgroups list with wrong request`() {
         withIntegrationApplication {
-            `Given I have citizen`("Blaise", "Pascal")
-            `Given I have citizen`("Roger", "Penrose", id = "6d883fe7-5fc0-4a50-8858-72230673eba4")
-            `Given I have citizen`("Alessandro", "Volta", id = "b5bac515-45d4-4aeb-9b6d-2627a0bbc419")
-            `Given I have workgroup`("b0ea1922-3bc6-44e2-aa7c-40158998cfbb", createdBy = Name("Blaise", "Pascal"))
-            `When I send a POST request`("/workgroups/b0ea1922-3bc6-44e2-aa7c-40158998cfbb/members") {
-                `authenticated as`("Blaise", "Pascal")
-                `with body`(
-                    """
-                    [
-                        {
-                            "citizen": {"id":"6d883fe7-5fc0-4a50-8858-72230673eba4"},
-                            "roles": ["MASTER"]
-                        },
-                        {
-                            "citizen": {"id":"b5bac515-45d4-4aeb-9b6d-2627a0bbc419"},
-                            "roles": ["MASTER"]
-                        }
-                    ]
-                    """
-                )
-            } `Then the response should be` Created
-        }
-    }
-
-    @Test
-    fun `I can remove member to workgroup`() {
-        withIntegrationApplication {
-            `Given I have citizen`("Heinrich", "Hertz", id = "94f92424-c257-4582-907c-98564a8c4ac9")
-            `Given I have citizen`("William", "Thomson", id = "87909ba3-2069-431c-9924-219fd8411cf2")
-            `Given I have citizen`("Paul", "Dirac", id = "1baf48bb-02bc-4d8f-ac86-33335354f5e7")
-            `Given I have workgroup`("b6c975df-dd44-4e99-adc1-f605746b0e11", createdBy = Name("Heinrich", "Hertz")) {
-                `With members`(
-                    Name("William", "Thomson"),
-                    Name("Paul", "Dirac"),
-                )
-            }
-            `When I send a DELETE request`("/workgroups/b6c975df-dd44-4e99-adc1-f605746b0e11/members") {
-                `authenticated as`("Heinrich", "Hertz")
-                """
-                [
-                  {
-                    "citizen": {"id":"87909ba3-2069-431c-9924-219fd8411cf2"}
-                  }
-                ]
-                """
-            } `Then the response should be` OK and {
-                `And the response should contain list`("$", 2)
-                `And the response should contain`("$.[0]citizen.id", "94f92424-c257-4582-907c-98564a8c4ac9")
-                `And the response should contain`("$.[1]citizen.id", "1baf48bb-02bc-4d8f-ac86-33335354f5e7")
-            }
-        }
-    }
-
-    @Test
-    fun `I can update members on workgroup`() {
-        withIntegrationApplication {
-            `Given I have citizen`("Leon", "Foucault")
-            `Given I have citizen`("Sadi", "Carnot", id = "be3b0926-8628-4426-804a-75188a6eb315")
-            `Given I have citizen`("Joseph", "Fourier", id = "b49e20c1-8393-45d6-a6a0-3fa5c71cbdc1")
-            `Given I have citizen`("Georg", "Ohm")
-            `Given I have workgroup`("784fe6bc-7635-4ae2-b080-3a4743b998bf", createdBy = Name("Leon", "Foucault")) {
-                `With members`(
-                    Name("Sadi", "Carnot"),
-                    Name("Joseph", "Fourier"),
-                )
-            }
-            `When I send a PUT request`("/workgroups/784fe6bc-7635-4ae2-b080-3a4743b998bf/members") {
-                `authenticated as`("Leon", "Foucault")
-                `with body`(
-                    """
-                    [
-                      {
-                        "citizen": {"id":"be3b0926-8628-4426-804a-75188a6eb315"},
-                        "roles": ["MASTER"]
-                      },
-                      {
-                        "citizen": {"id":"b49e20c1-8393-45d6-a6a0-3fa5c71cbdc1"},
-                        "roles": ["MASTER"]
-                      }
-                    ]
-                    """
-                )
-            } `Then the response should be` OK and {
-                `And the response should contain list`("$", 2)
-                `And the response should contain`("$.[0]citizen.id", "be3b0926-8628-4426-804a-75188a6eb315")
-                `And the response should contain`("$.[1]citizen.id", "b49e20c1-8393-45d6-a6a0-3fa5c71cbdc1")
+            `Given I have workgroup`("3fd8edb6-c4b4-4c94-bc75-ddd9b290d32c")
+            `When I send a GET request`("/workgroups?sort=plop", -REQUEST_PARAM) {
+            } `Then the response should be` BadRequest and {
+                `And the response should not be null`()
+                `And the response should contain`("$.invalidParams[0].name", ".sort")
+                `And the response should contain`("$.invalidParams[0].reason", "must be one of: 'name', 'createdAt'")
             }
         }
     }
diff --git a/src/test/kotlin/integration/steps/given/Article.kt b/src/test/kotlin/integration/steps/given/Article.kt
index a9d978d..b32f431 100644
--- a/src/test/kotlin/integration/steps/given/Article.kt
+++ b/src/test/kotlin/integration/steps/given/Article.kt
@@ -6,6 +6,7 @@ import fr.dcproject.component.article.database.ArticleForUpdate
 import fr.dcproject.component.article.database.ArticleForView
 import fr.dcproject.component.article.database.ArticleRepository
 import fr.dcproject.component.citizen.database.CitizenI.Name
+import fr.dcproject.component.citizen.database.CitizenRef
 import fr.dcproject.component.workgroup.database.WorkgroupRef
 import io.ktor.server.testing.TestApplicationEngine
 import org.koin.core.context.GlobalContext
@@ -16,7 +17,15 @@ fun TestApplicationEngine.`Given I have article`(
     workgroup: WorkgroupRef? = null,
     createdBy: Name? = null
 ) {
-    createArticle(id?.toUUID(), workgroup, createdBy)
+    createArticle(id?.toUUID(), workgroup, createCitizen(name = createdBy))
+}
+
+fun TestApplicationEngine.`Given I have article`(
+    id: String? = null,
+    workgroup: WorkgroupRef? = null,
+    createdBy: UUID
+) {
+    createArticle(id?.toUUID(), workgroup, createCitizen(id = createdBy))
 }
 
 fun TestApplicationEngine.`Given I have articles`(
@@ -35,18 +44,16 @@ fun TestApplicationEngine.`Given I have article created by workgroup`(
 fun createArticle(
     id: UUID? = null,
     workgroup: WorkgroupRef? = null,
-    createdBy: Name? = null
+    createdBy: CitizenRef = createCitizen()
 ): ArticleForView {
     val articleRepository: ArticleRepository by lazy { GlobalContext.get().koin.get() }
 
-    val citizen = createCitizen(createdBy)
-
     val article = ArticleForUpdate(
         id = id ?: UUID.randomUUID(),
         title = LoremIpsum().getTitle(3),
         content = LoremIpsum().getParagraphs(1, 2),
         description = LoremIpsum().getParagraphs(1, 2),
-        createdBy = citizen,
+        createdBy = createdBy,
         workgroup = workgroup,
         versionId = UUID.randomUUID()
     )
diff --git a/src/test/kotlin/integration/steps/given/Auth.kt b/src/test/kotlin/integration/steps/given/Auth.kt
index f8e1b8b..6c6fb71 100644
--- a/src/test/kotlin/integration/steps/given/Auth.kt
+++ b/src/test/kotlin/integration/steps/given/Auth.kt
@@ -3,6 +3,7 @@ package integration.steps.given
 import com.auth0.jwt.JWT
 import fr.dcproject.component.auth.jwt.JwtConfig
 import fr.dcproject.component.citizen.database.Citizen
+import fr.dcproject.component.citizen.database.CitizenI
 import fr.dcproject.component.citizen.database.CitizenRepository
 import io.ktor.http.HttpHeaders
 import io.ktor.server.testing.TestApplicationRequest
@@ -25,3 +26,23 @@ fun TestApplicationRequest.`authenticated as`(
 
     return citizen
 }
+fun TestApplicationRequest.`authenticated in url as`(
+    firstName: String,
+    lastName: String,
+): Citizen {
+    val repo: CitizenRepository by lazy<CitizenRepository> { GlobalContext.get().koin.get() }
+    val citizen = repo.findByName(CitizenI.Name(firstName, lastName)) ?: error("Citizen not exist with name $firstName $lastName")
+    val algorithm = GlobalContext.get().koin.get<JwtConfig>().algorithm
+    val jwtAsString: String = JWT.create()
+        .withIssuer("dc-project.fr")
+        .withClaim("id", citizen.user.id.toString())
+        .sign(algorithm)
+
+    uri += when (uri.contains('?')) {
+        true -> '&'
+        false -> '?'
+    }
+    uri += "token=$jwtAsString"
+
+    return citizen
+}
diff --git a/src/test/kotlin/integration/steps/given/Citizen.kt b/src/test/kotlin/integration/steps/given/Citizen.kt
index 9d81861..730ae70 100644
--- a/src/test/kotlin/integration/steps/given/Citizen.kt
+++ b/src/test/kotlin/integration/steps/given/Citizen.kt
@@ -23,7 +23,7 @@ fun TestApplicationEngine.`Given I have citizen`(
     val user = UserForCreate(
         id = id.toUUID(),
         username = "$firstName-$lastName".toLowerCase(),
-        password = "azerty",
+        password = "Azerty123!",
     )
     val citizen = CitizenForCreate(
         id = id.toUUID(),
@@ -36,23 +36,24 @@ fun TestApplicationEngine.`Given I have citizen`(
     return repo.insertWithUser(citizen)?.also { callback(it) }
 }
 
-fun createCitizen(createdBy: CitizenI.Name? = null): Citizen {
+fun createCitizen(name: CitizenI.Name? = null, id: UUID = UUID.randomUUID()): Citizen {
     val citizenRepository: CitizenRepository by lazy { GlobalContext.get().koin.get() }
 
-    return if (createdBy != null) {
-        citizenRepository.findByName(createdBy) ?: error("Citizen not exist")
+    return if (name != null) {
+        citizenRepository.findByName(name) ?: error("Citizen not exist")
     } else {
         val first = "firstName" + UUID.randomUUID().toString()
         val last = "lastName" + UUID.randomUUID().toString()
         val username = ("username" + UUID.randomUUID().toString())
         CitizenForCreate(
+            id = id,
             birthday = DateTime.now(),
             name = CitizenI.Name(
                 first,
                 last
             ),
             email = "$first@fakeemail.com",
-            user = UserForCreate(username = username, password = "azerty")
+            user = UserForCreate(username = username, password = "Azerty123!")
         ).let {
             citizenRepository.insertWithUser(it) ?: error("Unable to create User")
         }
diff --git a/src/test/kotlin/integration/steps/given/Comment.kt b/src/test/kotlin/integration/steps/given/Comment.kt
index 20689b5..6dee80e 100644
--- a/src/test/kotlin/integration/steps/given/Comment.kt
+++ b/src/test/kotlin/integration/steps/given/Comment.kt
@@ -2,11 +2,16 @@ package integration.steps.given
 
 import com.thedeanda.lorem.LoremIpsum
 import fr.dcproject.common.entity.TargetI
+import fr.dcproject.common.entity.TargetRef
 import fr.dcproject.common.utils.toUUID
 import fr.dcproject.component.article.database.ArticleRef
 import fr.dcproject.component.article.database.ArticleRepository
+import fr.dcproject.component.citizen.database.CitizenCreator
 import fr.dcproject.component.citizen.database.CitizenI.Name
 import fr.dcproject.component.comment.generic.database.CommentForUpdate
+import fr.dcproject.component.comment.generic.database.CommentForView
+import fr.dcproject.component.comment.generic.database.CommentI
+import fr.dcproject.component.comment.generic.database.CommentRef
 import fr.dcproject.component.comment.generic.database.CommentRepository
 import fr.dcproject.component.constitution.database.ConstitutionRef
 import fr.dcproject.component.constitution.database.ConstitutionRepository
@@ -32,14 +37,14 @@ fun TestApplicationEngine.`Given I have comments on article`(
     }
 }
 
-fun createComment(
+fun <A : ArticleRef> createComment(
     id: UUID? = null,
-    article: ArticleRef? = null,
+    article: A? = null,
     createdBy: Name? = null,
     content: String? = null
-) {
+): CommentForView<TargetRef, CitizenCreator> {
     val articleRepository: ArticleRepository by lazy { GlobalContext.get().koin.get() }
-    createCommentOnTarget(
+    return createCommentOnTarget(
         id,
         article?.id?.let { articleRepository.findById(article.id) } ?: createArticle(article?.id),
         createdBy,
@@ -56,14 +61,14 @@ fun TestApplicationEngine.`Given I have comment on constitution`(
     createComment(id?.toUUID(), ConstitutionRef(constitution?.toUUID()), createdBy, content)
 }
 
-fun createComment(
+fun <C : ConstitutionRef> createComment(
     id: UUID? = null,
-    constitution: ConstitutionRef? = null,
+    constitution: C? = null,
     createdBy: Name? = null,
     content: String? = null
-) {
+): CommentForView<TargetRef, CitizenCreator> {
     val constitutionRepository: ConstitutionRepository by lazy { GlobalContext.get().koin.get() }
-    createCommentOnTarget(
+    return createCommentOnTarget(
         id,
         constitution?.id?.let { constitutionRepository.findById(constitution.id) } ?: createConstitution(constitution?.id),
         createdBy,
@@ -71,12 +76,12 @@ fun createComment(
     )
 }
 
-fun createCommentOnTarget(
+fun <T : TargetI> createCommentOnTarget(
     id: UUID? = null,
-    target: TargetI,
+    target: T,
     createdBy: Name? = null,
     content: String? = null
-) {
+): CommentForView<TargetRef, CitizenCreator> {
     val commentRepository: CommentRepository by lazy { GlobalContext.get().koin.get() }
     val creator = createCitizen(createdBy)
     val comment = CommentForUpdate(
@@ -85,5 +90,41 @@ fun createCommentOnTarget(
         target = target,
         content = content ?: LoremIpsum().getParagraphs(1, 3)
     )
-    commentRepository.comment(comment)
+    return commentRepository.comment(comment)
+}
+
+fun TestApplicationEngine.`Given I have comment on comment`(
+    id: String? = null,
+    parent: String? = null,
+    createdBy: Name? = null,
+    content: String? = null,
+): CommentForView<out TargetRef, CitizenCreator> {
+    return createCommentOnComment(
+        id?.toUUID() ?: UUID.randomUUID(),
+        parent?.run { CommentRef(toUUID()) },
+        createdBy,
+        content,
+    )
+}
+
+fun createCommentOnComment(
+    id: UUID? = null,
+    parent: CommentI? = createComment<ArticleRef>(),
+    createdBy: Name? = null,
+    content: String? = null
+): CommentForView<out TargetRef, CitizenCreator> {
+    val creator = createCitizen(createdBy)
+    val commentRepository: CommentRepository by lazy { GlobalContext.get().koin.get() }
+    val parentComment = if (parent == null) {
+        createComment<ArticleRef>()
+    } else {
+        commentRepository.findById(parent.id) ?: error("Parent of comment not found")
+    }
+    val comment = CommentForUpdate(
+        id = id ?: UUID.randomUUID(),
+        createdBy = creator,
+        content = content ?: LoremIpsum().getParagraphs(1, 3),
+        parent = parentComment,
+    )
+    return commentRepository.comment(comment)
 }
diff --git a/src/test/kotlin/integration/steps/given/Follow.kt b/src/test/kotlin/integration/steps/given/Follow.kt
index 084f09d..3e9191f 100644
--- a/src/test/kotlin/integration/steps/given/Follow.kt
+++ b/src/test/kotlin/integration/steps/given/Follow.kt
@@ -3,6 +3,7 @@ package integration.steps.given
 import fr.dcproject.common.utils.toUUID
 import fr.dcproject.component.article.database.ArticleRef
 import fr.dcproject.component.citizen.database.Citizen
+import fr.dcproject.component.citizen.database.CitizenI
 import fr.dcproject.component.citizen.database.CitizenRef
 import fr.dcproject.component.citizen.database.CitizenRepository
 import fr.dcproject.component.constitution.database.ConstitutionRef
@@ -30,7 +31,7 @@ fun TestApplicationEngine.`Given I have follow on article`(
     article: String,
 ) {
     val citizenRepository: CitizenRepository by lazy { GlobalContext.get().koin.get() }
-    val citizen = citizenRepository.findByUsername("$firstName-$lastName".toLowerCase()) ?: error("Citizen not exist")
+    val citizen = citizenRepository.findByName(CitizenI.Name(firstName, lastName)) ?: error("Citizen not exist")
     createFollow(citizen, ArticleRef(article.toUUID()))
 }
 
@@ -40,7 +41,7 @@ fun TestApplicationEngine.`Given I have follow on constitution`(
     constitution: String,
 ) {
     val citizenRepository: CitizenRepository by lazy { GlobalContext.get().koin.get() }
-    val citizen = citizenRepository.findByUsername("$firstName-$lastName".toLowerCase()) ?: error("Citizen not exist")
+    val citizen = citizenRepository.findByName(CitizenI.Name(firstName, lastName)) ?: error("Citizen not exist")
     createFollow(citizen, ArticleRef(constitution.toUUID()))
 }
 
diff --git a/src/test/kotlin/integration/steps/given/Workgroup.kt b/src/test/kotlin/integration/steps/given/Workgroup.kt
index 33548c7..5871439 100644
--- a/src/test/kotlin/integration/steps/given/Workgroup.kt
+++ b/src/test/kotlin/integration/steps/given/Workgroup.kt
@@ -65,7 +65,7 @@ private fun createWorkgroup(
             .toLowerCase().replace(' ', '-')
         val user = UserForCreate(
             username = username,
-            password = "azerty",
+            password = "Azerty123!",
         )
         CitizenForCreate(
             name = creatorName,
diff --git a/src/test/kotlin/integration/steps/then/request.kt b/src/test/kotlin/integration/steps/then/request.kt
index cc5156d..cdea9e5 100644
--- a/src/test/kotlin/integration/steps/then/request.kt
+++ b/src/test/kotlin/integration/steps/then/request.kt
@@ -46,7 +46,7 @@ infix fun TestApplicationResponse.`And have property`(path: String): Pair<JsonPa
         } ?: throw AssertionError("\"${path}\" element not found on json response")
     }
 
-infix fun Pair<JsonPath, Any>.`whish contains`(expected: Any): Pair<JsonPath, Any> = this.apply {
+infix fun Pair<JsonPath, Any>.`which contains`(expected: Any): Pair<JsonPath, Any> = this.apply {
     second `should be equal to` expected
 }
 
diff --git a/src/test/kotlin/integration/steps/when/request.kt b/src/test/kotlin/integration/steps/when/request.kt
index b09e19b..fe71e72 100644
--- a/src/test/kotlin/integration/steps/when/request.kt
+++ b/src/test/kotlin/integration/steps/when/request.kt
@@ -1,5 +1,6 @@
 package integration.steps.`when`
 
+import fr.dcproject.common.BitMask
 import fr.dcproject.common.BitMaskI
 import integration.steps.then.`And the schema parameters must be valid`
 import integration.steps.then.`And the schema request body must be valid`
@@ -14,6 +15,7 @@ import io.ktor.server.testing.TestApplicationRequest
 import io.ktor.server.testing.setBody
 
 enum class Validate(override val bit: Long) : BitMaskI {
+    NONE(0),
     REQUEST_BODY(1),
     REQUEST_PARAM(2),
     REQUEST_HEADER(4),
@@ -22,6 +24,8 @@ enum class Validate(override val bit: Long) : BitMaskI {
     RESPONSE_HEADER(16),
     RESPONSE(8 + 16),
     ALL((1 + 2 + 4) + (8 + 16));
+
+    operator fun unaryMinus(): BitMaskI = ALL - BitMask(this.bit)
 }
 
 fun TestApplicationCall.valid(validate: BitMaskI): TestApplicationCall {
@@ -40,7 +44,7 @@ fun TestApplicationCall.valid(validate: BitMaskI): TestApplicationCall {
     return this
 }
 
-fun TestApplicationEngine.`When I send a GET request`(uri: String? = null, validate: Validate = Validate.ALL, setup: (TestApplicationRequest.() -> Unit)? = null): TestApplicationCall {
+fun TestApplicationEngine.`When I send a GET request`(uri: String? = null, validate: BitMaskI = Validate.ALL, setup: (TestApplicationRequest.() -> Unit)? = null): TestApplicationCall {
     return handleRequest(true) {
         method = HttpMethod.Get
         if (uri != null) {
@@ -74,7 +78,7 @@ fun TestApplicationEngine.`When I send a PUT request`(uri: String? = null, valid
     }.valid(validate)
 }
 
-fun TestApplicationEngine.`When I send a DELETE request`(uri: String? = null, validate: Validate = Validate.ALL, setup: (TestApplicationRequest.() -> String?)? = null): TestApplicationCall {
+fun TestApplicationEngine.`When I send a DELETE request`(uri: String? = null, validate: BitMaskI = Validate.ALL, setup: (TestApplicationRequest.() -> String?)? = null): TestApplicationCall {
     return handleRequest(true) {
         method = HttpMethod.Delete
         if (uri != null) {
diff --git a/src/test/kotlin/unit/Email Validation.kt b/src/test/kotlin/unit/Email Validation.kt
new file mode 100644
index 0000000..a7754ff
--- /dev/null
+++ b/src/test/kotlin/unit/Email Validation.kt	
@@ -0,0 +1,32 @@
+package unit
+
+import fr.dcproject.common.validation.email
+import io.konform.validation.Invalid
+import io.konform.validation.Valid
+import io.konform.validation.Validation
+import org.amshove.kluent.`should be instance of`
+import org.junit.jupiter.api.Tag
+import org.junit.jupiter.api.Tags
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.junit.jupiter.api.parallel.Execution
+import org.junit.jupiter.api.parallel.ExecutionMode
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+@Execution(ExecutionMode.CONCURRENT)
+@Tags(Tag("validation"), Tag("unit"))
+internal class `Email Validation` {
+    @Test
+    fun passwordScore() {
+        Validation<ObjectToValid> {
+            ObjectToValid::email {
+                email()
+            }
+        }.run {
+            validate(ObjectToValid("abc@123.com")) `should be instance of` Valid::class
+            validate(ObjectToValid("abc123.com")) `should be instance of` Invalid::class
+        }
+    }
+
+    class ObjectToValid(val email: String)
+}
diff --git a/src/test/kotlin/unit/Password Validation.kt b/src/test/kotlin/unit/Password Validation.kt
new file mode 100644
index 0000000..242d0de
--- /dev/null
+++ b/src/test/kotlin/unit/Password Validation.kt	
@@ -0,0 +1,46 @@
+package unit
+
+import fr.dcproject.common.validation.passwordScore
+import io.konform.validation.Invalid
+import io.konform.validation.Valid
+import io.konform.validation.Validation
+import org.amshove.kluent.`should be equal to`
+import org.amshove.kluent.`should be instance of`
+import org.junit.jupiter.api.Tag
+import org.junit.jupiter.api.Tags
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.junit.jupiter.api.parallel.Execution
+import org.junit.jupiter.api.parallel.ExecutionMode
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+@Execution(ExecutionMode.CONCURRENT)
+@Tags(Tag("validation"), Tag("unit"))
+internal class `Password Validation` {
+    @Test
+    fun password() {
+        "1234567890".passwordScore() `should be equal to` 10
+        "1234567A".passwordScore() `should be equal to` 10
+        "1234Aa".passwordScore() `should be equal to` 10
+        "12Aab".passwordScore() `should be equal to` 11
+        "1234Aa".passwordScore() `should be equal to` 10
+        "12abCD-+".passwordScore() `should be equal to` 18
+        "Abcde12!".passwordScore() `should be equal to` 15
+        "Hello world".passwordScore() `should be equal to` 16
+        "hello WORLD".passwordScore() `should be equal to` 17
+    }
+
+    @Test
+    fun passwordScore() {
+        Validation<ObjectToValid> {
+            ObjectToValid::password {
+                this.passwordScore(10)
+            }
+        }.run {
+            validate(ObjectToValid("1234567890")) `should be instance of` Valid::class
+            validate(ObjectToValid("12345678")) `should be instance of` Invalid::class
+        }
+    }
+
+    class ObjectToValid(val password: String)
+}
diff --git a/src/test/resources/sql/comment.sql b/src/test/resources/sql/comment.sql
index 5903c63..95dbb20 100644
--- a/src/test/resources/sql/comment.sql
+++ b/src/test/resources/sql/comment.sql
@@ -22,7 +22,7 @@ begin
     select "comment"(
         reference => 'article'::regclass,
         resource => _comment
-    ) into _comment_id;
+    )->>'id' into _comment_id;
 
     assert (select count(*) = 1 from "comment"), 'comment must be inserted, "' || (select count(*) from "comment") || '" exist';
     assert (select com.content = 'Ho my god !' from "comment" com), 'the content of comment must be "Ho my god !" instead of "' || (select com.content from "comment" as com) || '"';
@@ -67,7 +67,7 @@ begin
     select "comment"(
         reference => 'article'::regclass,
         resource => _comment
-    ) into _comment_id_response;
+    )->>'id' into _comment_id_response;
 
 
     _comment = json_build_object(
@@ -80,7 +80,7 @@ begin
     select "comment"(
         reference => 'article'::regclass,
         resource => _comment
-    ) into _comment_id_response2;
+    )->>'id' into _comment_id_response2;
     assert (select count(*) = 3 from "comment"), 'response must be inserted';
     assert (select com.parents_ids @> ARRAY[_comment_id] from "comment" com where id = _comment_id_response), 'parents_ids not contain "' || _comment_id::text || '" ' || (select com.parents_ids::text[] from "comment" com where id = _comment_id_response);
     assert (select com.parents_ids @> ARRAY[_comment_id_response] from "comment" com where id = _comment_id_response2), 'parents_ids not contain "' || _comment_id_response::text || '" ' || (select com.parents_ids::text[] from "comment" com where id = _comment_id_response2);
diff --git a/src/test/resources/sql/follow.sql b/src/test/resources/sql/follow.sql
index 58c27bd..0d98afc 100644
--- a/src/test/resources/sql/follow.sql
+++ b/src/test/resources/sql/follow.sql
@@ -29,6 +29,9 @@ begin
     assert (select following = true from find_follow(first_article_id, _citizen_id, 'article')), '(v1) find_follow must return the following';
     assert (select following = true from find_follow(first_article_updated_id, _citizen_id, 'article')), '(v2) find_follow must return the following';
 
+    assert (select f.total = 1 from find_follows_article_by_target(first_article_id) as f), 'find_follows_article_by_target must return 1 follow';
+    assert (select (f.resource#>>'{0, created_by, id}')::uuid = _citizen_id from find_follows_article_by_target(first_article_id) as f), 'find_follows_article_by_target must return follows with creator';
+
     perform unfollow('article'::regclass, first_article_id, _citizen_id);
     assert (select count(*) = 0 from follow), 'follow must be deleted after unfollow, event if article is on other version';