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46 lines
1.7 KiB
Python
46 lines
1.7 KiB
Python
from django.core.exceptions import FieldError
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from django.test import TestCase
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from .models import Choice, Poll, User
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class ReverseLookupTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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john = User.objects.create(name="John Doe")
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jim = User.objects.create(name="Jim Bo")
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first_poll = Poll.objects.create(
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question="What's the first question?", creator=john
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)
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second_poll = Poll.objects.create(
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question="What's the second question?", creator=jim
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)
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Choice.objects.create(
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poll=first_poll, related_poll=second_poll, name="This is the answer."
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)
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def test_reverse_by_field(self):
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u1 = User.objects.get(poll__question__exact="What's the first question?")
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self.assertEqual(u1.name, "John Doe")
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u2 = User.objects.get(poll__question__exact="What's the second question?")
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self.assertEqual(u2.name, "Jim Bo")
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def test_reverse_by_related_name(self):
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p1 = Poll.objects.get(poll_choice__name__exact="This is the answer.")
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self.assertEqual(p1.question, "What's the first question?")
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p2 = Poll.objects.get(related_choice__name__exact="This is the answer.")
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self.assertEqual(p2.question, "What's the second question?")
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def test_reverse_field_name_disallowed(self):
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"""
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If a related_name is given you can't use the field name instead
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"""
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msg = (
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"Cannot resolve keyword 'choice' into field. Choices are: "
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"creator, creator_id, id, poll_choice, question, related_choice"
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)
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with self.assertRaisesMessage(FieldError, msg):
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Poll.objects.get(choice__name__exact="This is the answer")
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