diff --git a/resources/sql/fixtures/01-user.sql b/resources/sql/fixtures/01-user.sql
new file mode 100644
index 0000000..91134b9
--- /dev/null
+++ b/resources/sql/fixtures/01-user.sql
@@ -0,0 +1,17 @@
+do
+$$
+declare
+    _password text := crypt('azerty', gen_salt('bf', 8));
+begin
+    delete from "user";
+    insert into "user" (username, password, blocked_at)
+    select
+        'username' || s,
+        _password,
+        case when s % 10 = 0 then now() else null end
+    from generate_series(1, 1000) s;
+
+    raise notice 'user fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/02-citizen.sql b/resources/sql/fixtures/02-citizen.sql
new file mode 100644
index 0000000..87e85b5
--- /dev/null
+++ b/resources/sql/fixtures/02-citizen.sql
@@ -0,0 +1,21 @@
+do
+$$
+begin
+    delete from citizen;
+    insert into citizen (name, birthday, user_id, vote_annonymous, follow_annonymous)
+    select
+        jsonb_build_object(
+            'first_name', 'first name' || row_number() over (),
+            'last_name', 'LAST NAME' || row_number() over (),
+            'civility', 'm'
+        ),
+        now() - interval '25 years',
+        u.id,
+        row_number() over () % 3 = 0,
+        row_number() over () % 5 = 1
+    from "user" u;
+
+    raise notice 'citizen fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/03-workgroup.sql b/resources/sql/fixtures/03-workgroup.sql
new file mode 100644
index 0000000..c0edb00
--- /dev/null
+++ b/resources/sql/fixtures/03-workgroup.sql
@@ -0,0 +1,26 @@
+do
+$$
+begin
+    delete from citizen_in_workgroup;
+    delete from workgroup;
+
+    insert into workgroup (created_by_id, name, description, annonymous, owner_id)
+    select
+        z.id,
+        'name' || rn,
+        'description' || rn,
+        rn % 3 = 1,
+        z.id
+    from (select *, row_number() over () rn from citizen) z;
+
+    insert into citizen_in_workgroup (citizen_id, workgroup_id)
+    select
+        z.id,
+        w.id
+    from (select *, row_number() over ()+5 % 1000 rn from citizen) z
+    join (select *, row_number() over () rn from workgroup) w using (rn);
+
+    raise notice 'workgroup fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/04-article.sql b/resources/sql/fixtures/04-article.sql
new file mode 100644
index 0000000..1c1024a
--- /dev/null
+++ b/resources/sql/fixtures/04-article.sql
@@ -0,0 +1,37 @@
+do
+$$
+declare
+    _tags text[] = $tags$
+    {
+        "nature", "green", "sky",
+        "nuclear", "oil", "black",
+        "love", "human", "scuirel"
+    }
+    $tags$;
+begin
+    delete from article_relations;
+    delete from article;
+
+    insert into article (version_id, created_by_id, title, annonymous, content, description, tags)
+    select
+        uuid_generate_v4(),
+        z.id,
+        'title' || row_number() over (),
+        row_number() over () % 3 = 0,
+        'content' || row_number() over (),
+        'description' || row_number() over (),
+        _tags[(row_number() over () % 5):(row_number() over () % 9)]
+    from citizen z;
+
+    insert into article_relations (source_id, target_id, created_by_id)
+    select
+        src.id,
+        dest.id,
+        src.created_by_id
+    from (select *, row_number() over () rn from article, lateral generate_series(1, 5) g) src
+    join (select *, row_number() over () +5 rn from article) dest using (rn);
+
+    raise notice 'article fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/05-constitution.sql b/resources/sql/fixtures/05-constitution.sql
new file mode 100644
index 0000000..195fd7b
--- /dev/null
+++ b/resources/sql/fixtures/05-constitution.sql
@@ -0,0 +1,38 @@
+do
+$$
+begin
+    delete from article_in_title;
+    delete from title;
+    delete from constitution;
+
+    insert into constitution (version_id, created_by_id, title, annonymous)
+    select
+        uuid_generate_v4(),
+        z.id,
+        'title' || row_number() over (),
+        row_number() over () % 3 = 0
+    from citizen z;
+
+    insert into title (created_by_id, name, rank, constitution_id)
+    select
+        c.created_by_id,
+        'name' || row_number() over (),
+        row_number() over (),
+        c.id
+    from constitution c,
+    lateral generate_series(1, 5) g;
+
+    insert into article_in_title (created_by_id, rank, title_id, article_id, constitution_id)
+    select
+        ti.created_by_id,
+        row_number() over (),
+        ti.id,
+        a.id,
+        ti.constitution_id
+    from (select *, (row_number() over () % 1005) rn from title, lateral generate_series(1, 3) g) ti
+    join (select *, row_number() over () rn from article) a using (rn);
+
+    raise notice 'constitution fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/06-follow.sql b/resources/sql/fixtures/06-follow.sql
new file mode 100644
index 0000000..7a0edc2
--- /dev/null
+++ b/resources/sql/fixtures/06-follow.sql
@@ -0,0 +1,30 @@
+do
+$$
+begin
+    delete from follow;
+
+    insert into follow_article (citizen_id, target_id)
+    select
+        z.id,
+        a.id
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5)) z
+    join (select *, row_number() over () rn from article) a using (rn);
+
+    insert into follow_constitution (citizen_id, target_id)
+    select
+        z.id,
+        a.id
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5)) z
+    join (select *, row_number() over () rn from constitution) a using (rn);
+
+    insert into follow_citizen (citizen_id, target_id)
+    select
+        z.id,
+        a.id
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5)) z
+    join (select *, row_number() over () rn from citizen) a using (rn);
+
+    raise notice 'follow fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/07-comment.sql b/resources/sql/fixtures/07-comment.sql
new file mode 100644
index 0000000..dbc4e27
--- /dev/null
+++ b/resources/sql/fixtures/07-comment.sql
@@ -0,0 +1,43 @@
+do
+$$
+begin
+    delete from comment;
+
+    insert into comment_on_article (citizen_id, target_id, content)
+    select
+        z.id,
+        a.id,
+        'content' || (row_number() over () * g)
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5) g) z
+    join (select *, row_number() over () rn from article) a using (rn);
+
+    insert into comment_on_article (citizen_id, target_id, content, parent_id)
+    select
+        z.id,
+        a.target_id,
+        'content' || row_number() over () * g,
+        a.id
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5) g) z
+    join (select *, row_number() over () rn from comment_on_article) a using (rn);
+
+    insert into comment_on_article (citizen_id, target_id, content, parent_id)
+    select
+        z.id,
+        a.target_id,
+        'content' || row_number() over () * g,
+        a.id
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5) g) z
+    join (select *, row_number() over () rn from comment_on_article where parent_id is not null) a using (rn);
+
+    insert into comment_on_constitution (citizen_id, target_id, content)
+    select
+        z.id,
+        a.id,
+        'content' || row_number() over () * g
+    from (select *, row_number() over () % 995 rn from citizen, lateral generate_series(1, 5) g) z
+    join (select *, row_number() over () rn from constitution) a using (rn);
+
+    raise notice 'comment fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/fixtures/08-vote.sql b/resources/sql/fixtures/08-vote.sql
new file mode 100644
index 0000000..d2fe62a
--- /dev/null
+++ b/resources/sql/fixtures/08-vote.sql
@@ -0,0 +1,48 @@
+do
+$$
+begin
+    delete from vote_for_article;
+    delete from vote_for_constitution;
+    delete from vote_for_comment_on_article;
+    delete from vote_for_comment_on_constitution;
+
+    insert into vote_for_article (citizen_id, target_id, note, anonymous)
+    select
+        z.id,
+        a.id,
+        (row_number() over () % 3) -1,
+        (row_number() over () % 3 = 1)
+    from (select *, row_number() over () % 995 rn, g from citizen, lateral generate_series(1, 10) g) z
+    join (select *, row_number() over () rn from article) a using (rn);
+
+    insert into vote_for_constitution (citizen_id, target_id, note, anonymous)
+    select
+        z.id,
+        a.id,
+        (row_number() over () % 3) -1,
+        (row_number() over () % 3 = 1)
+    from (select *, row_number() over () % 995 rn, g from citizen, lateral generate_series(1, 5) g) z
+    join (select *, row_number() over () rn from constitution) a using (rn);
+
+    insert into vote_for_comment_on_article (citizen_id, target_id, note, anonymous)
+    select
+        z.id,
+        a.id,
+        (row_number() over () % 3) -1,
+        (row_number() over () % 3 = 1)
+    from (select *, row_number() over () % 995 rn, g from citizen, lateral generate_series(1, 3) g) z
+    join (select *, row_number() over () rn from comment_on_article) a using (rn);
+
+    insert into vote_for_comment_on_constitution (citizen_id, target_id, note, anonymous)
+    select
+        z.id,
+        a.id,
+        (row_number() over () % 3) -1,
+        (row_number() over () % 3 = 1)
+    from (select *, row_number() over () % 995 rn, g from citizen, lateral generate_series(1, 2) g) z
+    join (select *, row_number() over () rn from comment_on_constitution) a using (rn);
+
+    raise notice 'vote fixtures done';
+end;
+$$;
+
diff --git a/resources/sql/functions/helpers/random_between.sql b/resources/sql/functions/helpers/random_between.sql
new file mode 100644
index 0000000..76e81dd
--- /dev/null
+++ b/resources/sql/functions/helpers/random_between.sql
@@ -0,0 +1,7 @@
+CREATE OR REPLACE FUNCTION random_between(low INT ,high INT)
+    RETURNS INT AS
+$$
+BEGIN
+    RETURN floor(random()* (high-low + 1) + low);
+END;
+$$ language 'plpgsql' STRICT;
\ No newline at end of file
diff --git a/resources/sql/migrations/0000-init_schema.up.sql b/resources/sql/migrations/0000-init_schema.up.sql
index 0642b6f..ac4cde6 100644
--- a/resources/sql/migrations/0000-init_schema.up.sql
+++ b/resources/sql/migrations/0000-init_schema.up.sql
@@ -37,10 +37,10 @@ create table workgroup
 
 create table citizen_in_workgroup
 (
-    citizen_id uuid                      not null references citizen (id),
-    workgroup  uuid                      not null references workgroup (id),
-    created_at timestamptz default now() not null,
-    primary key (citizen_id, workgroup)
+    citizen_id   uuid                      not null references citizen (id),
+    workgroup_id uuid                      not null references workgroup (id),
+    created_at   timestamptz default now() not null,
+    primary key (citizen_id, workgroup_id)
 );
 
 create table moderator