| from django.test import TestCase |
| from django.core.exceptions import FieldError |
| |
| from models import User, Poll, Choice |
| |
| class ReverseLookupTests(TestCase): |
| |
| def setUp(self): |
| john = User.objects.create(name="John Doe") |
| jim = User.objects.create(name="Jim Bo") |
| first_poll = Poll.objects.create( |
| question="What's the first question?", |
| creator=john |
| ) |
| second_poll = Poll.objects.create( |
| question="What's the second question?", |
| creator=jim |
| ) |
| new_choice = Choice.objects.create( |
| poll=first_poll, |
| related_poll=second_poll, |
| name="This is the answer." |
| ) |
| |
| def test_reverse_by_field(self): |
| u1 = User.objects.get( |
| poll__question__exact="What's the first question?" |
| ) |
| self.assertEqual(u1.name, "John Doe") |
| |
| u2 = User.objects.get( |
| poll__question__exact="What's the second question?" |
| ) |
| self.assertEqual(u2.name, "Jim Bo") |
| |
| def test_reverse_by_related_name(self): |
| p1 = Poll.objects.get(poll_choice__name__exact="This is the answer.") |
| self.assertEqual(p1.question, "What's the first question?") |
| |
| p2 = Poll.objects.get( |
| related_choice__name__exact="This is the answer.") |
| self.assertEqual(p2.question, "What's the second question?") |
| |
| def test_reverse_field_name_disallowed(self): |
| """ |
| If a related_name is given you can't use the field name instead |
| """ |
| self.assertRaises(FieldError, Poll.objects.get, |
| choice__name__exact="This is the answer") |
