Fix BDS group perms

bds/__init__.py

@@ -0,0 +1 @@
+default_app_config = "bds.apps.BdsConfig"

bds/apps.py

@@ -1,5 +1,31 @@
+from django import apps as global_apps
 from django.apps import AppConfig
+from django.db.models import Q
+from django.db.models.signals import post_migrate
+
+
+def bds_group_perms(app_config, apps=global_apps, **kwargs):
+    try:
+        Permission = apps.get_model("auth", "Permission")
+        Group = apps.get_model("auth", "Group")
+
+        group = Group.objects.get(name="Burô du BDS")
+        perms = Permission.objects.filter(
+            Q(content_type__app_label="bds")
+            | Q(content_type__app_label="auth") & Q(content_type__model="user")
+        )
+        group.permissions.set(perms)
+        group.save()
+
+    except (LookupError, Group.DoesNotExist):
+        return
 
 
 class BdsConfig(AppConfig):
     name = "bds"
+    verbose_name = "Gestion des adhérent·e·s du BDS"
+
+    def ready(self):
+        from . import signals  # noqa
+
+        post_migrate.connect(bds_group_perms, sender=self)

bds/migrations/0002_bds_group.py

@@ -1,24 +1,11 @@
 # Generated by Django 2.2 on 2019-07-17 14:56
 
-from django.contrib.auth.management import create_permissions
 from django.db import migrations
-from django.db.models import Q
 
 
 def create_bds_buro_group(apps, schema_editor):
-    for app_config in apps.get_app_configs():
-        create_permissions(app_config, apps=apps, verbosity=0)
-
     Group = apps.get_model("auth", "Group")
-    Permission = apps.get_model("auth", "Permission")
-    group, created = Group.objects.get_or_create(name="Burô du BDS")
-    if created:
-        perms = Permission.objects.filter(
-            Q(content_type__app_label="bds")
-            | Q(content_type__app_label="auth") & Q(content_type__model="user")
-        )
-        group.permissions.set(perms)
-        group.save()
+    Group.objects.get_or_create(name="Burô du BDS")
 
 
 class Migration(migrations.Migration):