apps: only execute post_migrate signal if the Operation model exists

src/authentic2_cut/apps.py

@@ -18,15 +18,20 @@
 
 import django.apps
 
+from django.db import router, DEFAULT_DB_ALIAS
+
 
 class AppConfig(django.apps.AppConfig):
     name = 'authentic2_cut'
 
-    def post_migrate(self, **kwargs):
+    def post_migrate(self, verbosity=2, interactive=True, using=DEFAULT_DB_ALIAS, **kwargs):
         # create custom operations
         from django_rbac.models import Operation
         from django_rbac.utils import get_operation
 
+        if not router.allow_migrate(using, Operation):
+            return
+
         FC_MANAGE_OP = Operation(name=u'Gérer France Connect',
                                  slug='fc_manage')
         get_operation(FC_MANAGE_OP)