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Ticket #17541: 17541.diff

File 17541.diff, 837 bytes (added by Anssi Kääriäinen, 12 years ago)

diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 848fd6e..acd1ff9 100644

                class ForeignRelatedObjectsDescriptor(object):
                     return self.instance._prefetched_objects_cache[rel_field.related_query_name()]
                 except (AttributeError, KeyError):
                     db = self._db or router.db_for_read(self.model, instance=self.instance)
+                    if getattr(self.instance, attname) is None:
+                        return super(RelatedManager, self).get_query_set().using(db).none()
                     return super(RelatedManager, self).get_query_set().using(db).filter(**self.core_filters)
             def get_prefetch_query_set(self, instances):