django/tests/regressiontests/generic_relations_regress/tests.py

from django.test import TestCase
from django.contrib.contenttypes.models import ContentType
from models import Link, Place, Restaurant, Person, Address

class GenericRelationTests(TestCase):

    def test_inherited_models_content_type(self):
        """
        Test that GenericRelations on inherited classes use the correct content
        type.
        """

        p = Place.objects.create(name="South Park")
        r = Restaurant.objects.create(name="Chubby's")
        l1 = Link.objects.create(content_object=p)
        l2 = Link.objects.create(content_object=r)
        self.assertEqual(list(p.links.all()), [l1])
        self.assertEqual(list(r.links.all()), [l2])

    def test_reverse_relation_pk(self):
        """
        Test that the correct column name is used for the primary key on the
        originating model of a query.  See #12664.
        """
        p = Person.objects.create(account=23, name='Chef')
        a = Address.objects.create(street='123 Anywhere Place',
                                   city='Conifer', state='CO',
                                   zipcode='80433', content_object=p)

        qs = Person.objects.filter(addresses__zipcode='80433')
        self.assertEqual(1, qs.count())
        self.assertEqual('Chef', qs[0].name)