Improve state backend fix, add tests for state backend and service signal changes

allianceauth/authentication/backends.py

@@ -1,7 +1,8 @@
-from django.contrib.auth.backends import ModelBackend
-from django.contrib.auth.models import Permission
-from django.contrib.auth.models import User
 import logging
+
+from django.contrib.auth.backends import ModelBackend
+from django.contrib.auth.models import User, Permission
+
 from .models import UserProfile, CharacterOwnership, OwnershipRecord
 
 
@@ -11,16 +12,11 @@ logger = logging.getLogger(__name__)
 class StateBackend(ModelBackend):
     @staticmethod
     def _get_state_permissions(user_obj):
-        """returns permissions for state of given user object"""
-        """
-        profile_state_field = UserProfile._meta.get_field('state')
-        user_state_query = 'state__%s__user' % profile_state_field.related_query_name()
-        return Permission.objects.filter(**{user_state_query: user_obj})
-        """
+        """returns permissions for state of given user object"""        
         if hasattr(user_obj, "profile") and user_obj.profile:
-            return Permission.objects.filter(state=user_obj.profile.state)
+            return Permission.objects.filter(state=user_obj.profile.state)            
         else:
-            return []
+            return Permission.objects.none()
 
     def get_state_permissions(self, user_obj, obj=None):
         return self._get_permissions(user_obj, obj, 'state')