def test_more_certain_fields(self):
        with self.assertNumQueries(2):
            world = Species.objects.filter(genus__name='Amanita')\
                .select_related('genus__family')
            orders = [o.genus.family.order.name for o in world]
            self.assertEqual(orders, [u'Agaricales'])
In this case, we explicitly say to select the 'genus' and
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/tests/modeltests/select_related/tests.py/SelectRelatedTests.test_more_certain_fields