Ticket #7588: 7588.naive.diff

django/db/models/base.py

@@ -112 +112 @@
                 new_class._meta.parents[base] = field
             else:
                 # The abstract base class case.
+                new_class._meta.parents.update(base._meta.parents)
                 names = set([f.name for f in new_class._meta.local_fields + new_class._meta.many_to_many])
                 for field in base._meta.local_fields + base._meta.local_many_to_many:
                     if field.name in names: