code: def current_set(self):
          
          assert self.model.KEY_FIELDS != (), "Just use model.current() if there are no KEY_FIELDS"
          return self.get_queryset().filter(
              pk__in=self._current_ids_subquery()
          ).annotate(
              is_active=models.Value(1, output_field=models.IntegerField())
          )
docs: A queryset for the active configuration entries only. Only useful if KEY_FIELDS is set.
  
          Active means the means recent entries for each unique combination of keys. It does not
          necessaryily mean enbled.