diff --git a/src/main/kotlin/application/Converters.kt b/src/main/kotlin/application/Converters.kt
index 71f5fd7..5bcb880 100644
--- a/src/main/kotlin/application/Converters.kt
+++ b/src/main/kotlin/application/Converters.kt
@@ -44,15 +44,6 @@ val converters: ConverterDeclaration = {
 
     // TODO remove converters of entities
 
-    convert<OpinionChoice> {
-        decode { values, _ ->
-            val id = values.singleOrNull()?.let { UUID.fromString(it) }
-                ?: throw InternalError("Cannot convert $values to UUID")
-            get<OpinionChoiceRepository>().findOpinionChoiceById(id)
-                ?: throw NotFoundException("OpinionChoice $values not found")
-        }
-    }
-
     convert<WorkgroupRef> {
         decode { values, _ ->
             values.singleOrNull()?.let {
diff --git a/src/main/kotlin/component/opinion/OpinionChoiceAccessControl.kt b/src/main/kotlin/component/opinion/OpinionChoiceAccessControl.kt
index ac3367b..a609c4b 100644
--- a/src/main/kotlin/component/opinion/OpinionChoiceAccessControl.kt
+++ b/src/main/kotlin/component/opinion/OpinionChoiceAccessControl.kt
@@ -2,14 +2,16 @@ package fr.dcproject.component.opinion
 
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.opinion.entity.OpinionChoice
+import fr.dcproject.component.opinion.entity.OpinionChoiceI
+import fr.dcproject.component.opinion.entity.OpinionChoiceRef
 import fr.dcproject.security.AccessControl
 import fr.dcproject.security.AccessResponse
 
 class OpinionChoiceAccessControl : AccessControl() {
-    fun canView(subjects: List<OpinionChoice>, citizen: CitizenI?): AccessResponse =
+    fun canView(subjects: List<OpinionChoiceI>, citizen: CitizenI?): AccessResponse =
         canAll(subjects) { canView(it, citizen) }
 
-    fun canView(subject: OpinionChoice, citizen: CitizenI?): AccessResponse {
+    fun canView(subject: OpinionChoiceI, citizen: CitizenI?): AccessResponse {
         return granted()
     }
 }
diff --git a/src/main/kotlin/component/opinion/entity/OpinionChoice.kt b/src/main/kotlin/component/opinion/entity/OpinionChoice.kt
index 660a4ca..54ad0ae 100644
--- a/src/main/kotlin/component/opinion/entity/OpinionChoice.kt
+++ b/src/main/kotlin/component/opinion/entity/OpinionChoice.kt
@@ -5,6 +5,7 @@ import fr.postgresjson.entity.EntityCreatedAtImp
 import fr.postgresjson.entity.EntityDeletedAt
 import fr.postgresjson.entity.EntityDeletedAtImp
 import fr.postgresjson.entity.UuidEntity
+import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 class OpinionChoice(
@@ -17,4 +18,7 @@ class OpinionChoice(
 
 open class OpinionChoiceRef(
     id: UUID?
-) : UuidEntity(id ?: UUID.randomUUID())
+) : OpinionChoiceI,
+    UuidEntity(id ?: UUID.randomUUID())
+
+interface OpinionChoiceI : UuidEntityI
diff --git a/src/main/kotlin/component/opinion/routes/GetOpinionChoice.kt b/src/main/kotlin/component/opinion/routes/GetOpinionChoice.kt
index f1217c1..07ddb81 100644
--- a/src/main/kotlin/component/opinion/routes/GetOpinionChoice.kt
+++ b/src/main/kotlin/component/opinion/routes/GetOpinionChoice.kt
@@ -2,25 +2,31 @@ package fr.dcproject.component.opinion.routes
 
 import fr.dcproject.component.auth.citizenOrNull
 import fr.dcproject.component.opinion.OpinionChoiceAccessControl
-import fr.dcproject.component.opinion.entity.OpinionChoice
+import fr.dcproject.component.opinion.OpinionChoiceRepository
+import fr.dcproject.component.opinion.entity.OpinionChoiceRef
 import fr.dcproject.security.assert
 import io.ktor.application.call
+import io.ktor.features.NotFoundException
 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 GetOpinionChoice {
     @Location("/opinions/{opinionChoice}")
-    class OpinionChoiceRequest(val opinionChoice: OpinionChoice)
+    class OpinionChoiceRequest(opinionChoice: UUID) {
+        val opinionChoice = OpinionChoiceRef(opinionChoice)
+    }
 
-    fun Route.getOpinionChoice(ac: OpinionChoiceAccessControl) {
+    fun Route.getOpinionChoice(ac: OpinionChoiceAccessControl, opinionChoiceRepository: OpinionChoiceRepository) {
         get<OpinionChoiceRequest> {
+            val opinionChoice = opinionChoiceRepository.findOpinionChoiceById(it.opinionChoice.id) ?: throw NotFoundException("OpinionChoice ${it.opinionChoice.id} not found")
             ac.assert { canView(it.opinionChoice, citizenOrNull) }
 
-            call.respond(it.opinionChoice)
+            call.respond(opinionChoice)
         }
     }
 }
diff --git a/src/main/kotlin/component/opinion/routes/install.kt b/src/main/kotlin/component/opinion/routes/install.kt
index 59851a1..7426941 100644
--- a/src/main/kotlin/component/opinion/routes/install.kt
+++ b/src/main/kotlin/component/opinion/routes/install.kt
@@ -8,6 +8,7 @@ import fr.dcproject.component.opinion.routes.OpinionArticle.setOpinionOnArticle
 import io.ktor.auth.authenticate
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.routing.Routing
+import io.ktor.routing.get
 import org.koin.ktor.ext.get
 
 @KtorExperimentalLocationsAPI
@@ -16,7 +17,7 @@ fun Routing.installOpinionRoutes() {
         getCitizenOpinions(get(), get())
         getMyOpinionsArticle(get(), get())
         setOpinionOnArticle(get(), get())
-        getOpinionChoice(get())
+        getOpinionChoice(get(), get())
         getOpinionChoices(get(), get())
     }
 }