diff --git a/backend/api/exercices/migrations/0002_initial.py b/backend/api/exercices/migrations/0002_initial.py
new file mode 100644
index 00000000..4ee1e2c7
--- /dev/null
+++ b/backend/api/exercices/migrations/0002_initial.py
@@ -0,0 +1,37 @@
+# Generated by Django 4.0 on 2022-07-29 09:08
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('exercices', '0001_initial'),
+        ('users', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='tag',
+            name='user',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='users.customuser'),
+        ),
+        migrations.AddField(
+            model_name='exercice',
+            name='author',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='users.customuser'),
+        ),
+        migrations.AddField(
+            model_name='exercice',
+            name='origin',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='exercices.exercice'),
+        ),
+        migrations.AddField(
+            model_name='exercice',
+            name='tags',
+            field=models.ManyToManyField(to='exercices.Tag'),
+        ),
+    ]
diff --git a/backend/api/exercices/migrations/0003_generate_code.py b/backend/api/exercices/migrations/0003_generate_code.py
new file mode 100644
index 00000000..199279c1
--- /dev/null
+++ b/backend/api/exercices/migrations/0003_generate_code.py
@@ -0,0 +1,26 @@
+from django.db import migrations, models
+import exercices.models
+
+
+class Migration(migrations.Migration):
+
+
+    dependencies = [
+        ('exercices', '0002_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='exercice',
+            name='id_code',
+            field=models.CharField(
+                max_length=50, default=exercices.models.generate_unique_code_step, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='tag',
+            name='id_code',
+            field=models.CharField(
+                max_length=50, default=exercices.models.generate_unique_code_tag, unique=True),
+        ),
+        
+    ]
diff --git a/backend/api/room/migrations/0002_initial.py b/backend/api/room/migrations/0002_initial.py
new file mode 100644
index 00000000..2304108d
--- /dev/null
+++ b/backend/api/room/migrations/0002_initial.py
@@ -0,0 +1,28 @@
+# Generated by Django 4.0 on 2022-07-29 09:08
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('room', '0001_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='room',
+            name='userMembers',
+            field=models.ManyToManyField(to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AddField(
+            model_name='parcours',
+            name='room',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='room.room'),
+        ),
+    ]
diff --git a/backend/api/room/migrations/0003_generate_code.py b/backend/api/room/migrations/0003_generate_code.py
new file mode 100644
index 00000000..00c0873e
--- /dev/null
+++ b/backend/api/room/migrations/0003_generate_code.py
@@ -0,0 +1,30 @@
+from django.db import migrations, models
+import room.models
+
+class Migration(migrations.Migration):
+  
+    
+    dependencies = [
+        ('room', '0002_initial'),
+    ]
+    
+    operations = [
+        migrations.AlterField(
+            model_name='room',
+            name='id_code',
+            field=models.CharField(
+                max_length=50, default=room.models.generate_unique_code_room, unique = True),
+        ),
+        migrations.AlterField(
+            model_name='parcours',
+            name='id_code',
+            field=models.CharField(
+                max_length=50, default=room.models.generate_unique_code_parcours, unique = True),
+        ),
+        migrations.AlterField(
+            model_name='tempcorrection',
+            name='id_code',
+            field=models.CharField(
+                max_length=50, default=room.models.generate_unique_code_corr, unique = True),
+        ),
+    ]
diff --git a/backend/api/users/migrations/0002_generate_code.py b/backend/api/users/migrations/0002_generate_code.py
new file mode 100644
index 00000000..4b5e54e7
--- /dev/null
+++ b/backend/api/users/migrations/0002_generate_code.py
@@ -0,0 +1,26 @@
+from django.db import migrations, models
+import users.models
+
+
+class Migration(migrations.Migration):
+
+
+    dependencies = [
+        ('users', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='customuser',
+            name='id_code',
+            field=models.CharField(
+                max_length=50, default=users.models.generate_unique_code, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='customuser',
+            name='clientId',
+            field=models.CharField(
+                max_length=50, default=users.models.generate_unique_uuid, unique=True),
+        ),
+        
+    ]