Fetching inherited model objects in django

Question

I have a django application with the following model:

Object A is a simple object extending from Model with a few fields, and let\'s say, a particul

Answer 1

If A can be concrete, you can do this all in one query using select_related.

from django.db import connection
q = A.objects.filter(NAME__istartswith='z').order_by('ORDER').select_related('b', 'c')
for obj in q:
   obj = obj.b or obj.c or obj
   print repr(obj), obj.__dict__ # (to prove the subclass-specific attributes exist)
print "query count:", len(connection.queries)