sync role permissions with main permission on signal

apps/authorization/apps.py

@@ -4,3 +4,6 @@ from django.apps import AppConfig
 class AuthorizationConfig(AppConfig):
     default_auto_field = 'django.db.models.BigAutoField'
     name = 'apps.authorization'
+
+    def ready(self):
+        import apps.authorization.signals

apps/authorization/signals.py

@@ -0,0 +1,27 @@
+from django.db.models import Sum
+from apps.authorization.models import Role, UserRelations
+from django.db.models.signals import post_save, post_delete
+from django.dispatch import receiver
+
+
+@receiver([post_save], sender=UserRelations)
+def sync_role_permissions(sender, instance, **kwargs):
+    """ add role permissions to user relation permissions in is null """
+
+    # if _from_signal=True prevent from maximum recursion loop
+    if getattr(instance, '_from_signal', False):
+        return
+
+    if instance.role:
+        permissions = instance.role.permissions.all()
+    if not instance.permissions.exists():
+        instance.permissions.add(*permissions)  # noqa
+        print(instance.permissions)
+
+    instance._from_signal = True
+    instance.save()
+
+
+
+
+