diff --git a/src/main/kotlin/fr/dcproject/entity/Article.kt b/src/main/kotlin/fr/dcproject/entity/Article.kt
index ee5b863..65a3c98 100644
--- a/src/main/kotlin/fr/dcproject/entity/Article.kt
+++ b/src/main/kotlin/fr/dcproject/entity/Article.kt
@@ -19,6 +19,9 @@ class Article(
     EntityCreatedAt by EntityCreatedAtImp(),
     EntityCreatedBy<Citizen> by EntityCreatedByImp(createdBy),
     EntityDeletedAt by EntityDeletedAtImp() {
+
+    val votes = VoteAggregation(0,0,0)
+
     init {
         tags = tags.distinct()
     }
diff --git a/src/main/kotlin/fr/dcproject/entity/VoteAggregation.kt b/src/main/kotlin/fr/dcproject/entity/VoteAggregation.kt
new file mode 100644
index 0000000..6487af7
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/entity/VoteAggregation.kt
@@ -0,0 +1,10 @@
+package fr.dcproject.entity
+
+import fr.postgresjson.entity.EntityUpdatedAt
+import fr.postgresjson.entity.EntityUpdatedAtImp
+
+open class VoteAggregation (
+    val up: Int,
+    val neutral: Int,
+    val down: Int
+): EntityUpdatedAt by EntityUpdatedAtImp()
diff --git a/src/main/resources/sql/functions/article/find_article_by_id.sql b/src/main/resources/sql/functions/article/find_article_by_id.sql
index b462a38..2cd4cdd 100644
--- a/src/main/resources/sql/functions/article/find_article_by_id.sql
+++ b/src/main/resources/sql/functions/article/find_article_by_id.sql
@@ -7,7 +7,8 @@ begin
     from (
         select
             a.*,
-            find_citizen_by_id(a.created_by_id) as created_by
+            find_citizen_by_id(a.created_by_id) as created_by,
+            count_vote('article', a.id) as votes
         into resource
         from article as a
         where a.id = _id
diff --git a/src/main/resources/sql/functions/article/find_articles.sql b/src/main/resources/sql/functions/article/find_articles.sql
index e242d14..e6103d8 100644
--- a/src/main/resources/sql/functions/article/find_articles.sql
+++ b/src/main/resources/sql/functions/article/find_articles.sql
@@ -15,6 +15,7 @@ begin
         select
             a.*,
             find_citizen_by_id(a.created_by_id) as created_by,
+            count_vote('article', a.id) as votes,
             zdb.score(a.ctid) _score
         from article as a
         where (
diff --git a/src/main/resources/sql/functions/article/find_articles_versions_by_version_id.sql b/src/main/resources/sql/functions/article/find_articles_versions_by_version_id.sql
index 5df42bc..aabc062 100644
--- a/src/main/resources/sql/functions/article/find_articles_versions_by_version_id.sql
+++ b/src/main/resources/sql/functions/article/find_articles_versions_by_version_id.sql
@@ -14,7 +14,8 @@ begin
     from (
         select
             a.*,
-            find_citizen_by_id(a.created_by_id) as created_by
+            find_citizen_by_id(a.created_by_id) as created_by,
+            count_vote('article', a.id) as votes
         from article as a
         where a.version_id = _version_id
         order by a.version_number desc
diff --git a/src/main/resources/sql/functions/article/find_last_article_by_version_id.sql b/src/main/resources/sql/functions/article/find_last_article_by_version_id.sql
index 6e0c923..59982f9 100644
--- a/src/main/resources/sql/functions/article/find_last_article_by_version_id.sql
+++ b/src/main/resources/sql/functions/article/find_last_article_by_version_id.sql
@@ -7,7 +7,8 @@ begin
     from (
         select
             a.*,
-            find_citizen_by_id(a.created_by_id) as created_by
+            find_citizen_by_id(a.created_by_id) as created_by,
+            count_vote('article', a.id) as votes
         into resource
         from article as a
         where a.version_id = _version_id
diff --git a/src/main/resources/sql/functions/vote/count_vote.sql b/src/main/resources/sql/functions/vote/count_vote.sql
new file mode 100644
index 0000000..5a423cf
--- /dev/null
+++ b/src/main/resources/sql/functions/vote/count_vote.sql
@@ -0,0 +1,29 @@
+create or replace function count_vote(reference regclass, _target_id uuid, out resource json)
+    language plpgsql as
+$$
+declare
+    agg jsonb;
+    empty jsonb = '{"down":0,"neutral":0,"up":0}'::jsonb;
+begin
+    select jsonb_object_agg(t.label, t.total)
+    into agg
+    from (
+        select
+            count(v.note) as total,
+            (case v.note
+                when -1 then 'down'
+                when  0 then 'neutral'
+                when  1 then 'up'
+            end) as label
+        from vote v
+        where v.target_reference = reference
+          and v.target_id = _target_id
+        group by v.note
+        order by v.note
+    ) t;
+
+    resource = coalesce(agg, empty) || jsonb_build_object('updated_at', now());
+end;
+$$;
+
+-- drop function if exists count_vote(regclass,uuid);
\ No newline at end of file
diff --git a/src/test/sql/vote.sql b/src/test/sql/vote.sql
index 59e5b24..678c49b 100644
--- a/src/test/sql/vote.sql
+++ b/src/test/sql/vote.sql
@@ -24,6 +24,7 @@ declare
       ]
     }
     $json$;
+    votes jsonb;
 begin
     -- insert user for context
     select insert_user(created_user) into created_user;
@@ -67,6 +68,8 @@ begin
     exception when check_violation then
     end;
 
+    select count_vote('article', '933b6a1b-50c9-42b6-989f-c02a57814ef9') into votes;
+    assert ((votes->>'up')::int = 0), 'vote.up must be 0';
 
     -- delete vote and context
     delete from vote;