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bfb5b7150f
This resolves a problem on databases besides PostgreSQL when using prefetch_related with a source model that uses a UUID primary key.
96 lines
4.2 KiB
Python
96 lines
4.2 KiB
Python
from __future__ import unicode_literals
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from django.test import TestCase
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from .models import Flea, House, Person, Pet, Room
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class UUIDPrefetchRelated(TestCase):
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def test_prefetch_related_from_uuid_model(self):
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Pet.objects.create(name='Fifi').people.add(
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Person.objects.create(name='Ellen'),
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Person.objects.create(name='George'),
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)
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with self.assertNumQueries(2):
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pet = Pet.objects.prefetch_related('people').get(name='Fifi')
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with self.assertNumQueries(0):
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self.assertEqual(2, len(pet.people.all()))
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def test_prefetch_related_to_uuid_model(self):
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Person.objects.create(name='Bella').pets.add(
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Pet.objects.create(name='Socks'),
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Pet.objects.create(name='Coffee'),
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)
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with self.assertNumQueries(2):
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person = Person.objects.prefetch_related('pets').get(name='Bella')
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with self.assertNumQueries(0):
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self.assertEqual(2, len(person.pets.all()))
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def test_prefetch_related_from_uuid_model_to_uuid_model(self):
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fleas = [Flea.objects.create() for i in range(3)]
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Pet.objects.create(name='Fifi').fleas_hosted.add(*fleas)
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Pet.objects.create(name='Bobo').fleas_hosted.add(*fleas)
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with self.assertNumQueries(2):
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pet = Pet.objects.prefetch_related('fleas_hosted').get(name='Fifi')
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with self.assertNumQueries(0):
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self.assertEqual(3, len(pet.fleas_hosted.all()))
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with self.assertNumQueries(2):
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flea = Flea.objects.prefetch_related('pets_visited').get(pk=fleas[0].pk)
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with self.assertNumQueries(0):
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self.assertEqual(2, len(flea.pets_visited.all()))
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class UUIDPrefetchRelatedLookups(TestCase):
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@classmethod
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def setUpTestData(cls):
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house = House.objects.create(name='Redwood', address='Arcata')
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room = Room.objects.create(name='Racoon', house=house)
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fleas = [Flea.objects.create(current_room=room) for i in range(3)]
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pet = Pet.objects.create(name='Spooky')
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pet.fleas_hosted.add(*fleas)
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person = Person.objects.create(name='Bob')
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person.houses.add(house)
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person.pets.add(pet)
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person.fleas_hosted.add(*fleas)
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def test_from_uuid_pk_lookup_uuid_pk_integer_pk(self):
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# From uuid-pk model, prefetch <uuid-pk model>.<integer-pk model>:
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with self.assertNumQueries(4):
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spooky = Pet.objects.prefetch_related('fleas_hosted__current_room__house').get(name='Spooky')
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with self.assertNumQueries(0):
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self.assertEqual('Racoon', spooky.fleas_hosted.all()[0].current_room.name)
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def test_from_uuid_pk_lookup_integer_pk2_uuid_pk2(self):
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# From uuid-pk model, prefetch <integer-pk model>.<integer-pk model>.<uuid-pk model>.<uuid-pk model>:
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with self.assertNumQueries(5):
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spooky = Pet.objects.prefetch_related('people__houses__rooms__fleas').get(name='Spooky')
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with self.assertNumQueries(0):
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self.assertEqual(3, len(spooky.people.all()[0].houses.all()[0].rooms.all()[0].fleas.all()))
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def test_from_integer_pk_lookup_uuid_pk_integer_pk(self):
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# From integer-pk model, prefetch <uuid-pk model>.<integer-pk model>:
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with self.assertNumQueries(3):
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racoon = Room.objects.prefetch_related('fleas__people_visited').get(name='Racoon')
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with self.assertNumQueries(0):
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self.assertEqual('Bob', racoon.fleas.all()[0].people_visited.all()[0].name)
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def test_from_integer_pk_lookup_integer_pk_uuid_pk(self):
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# From integer-pk model, prefetch <integer-pk model>.<uuid-pk model>:
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with self.assertNumQueries(3):
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redwood = House.objects.prefetch_related('rooms__fleas').get(name='Redwood')
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with self.assertNumQueries(0):
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self.assertEqual(3, len(redwood.rooms.all()[0].fleas.all()))
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def test_from_integer_pk_lookup_integer_pk_uuid_pk_uuid_pk(self):
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# From integer-pk model, prefetch <integer-pk model>.<uuid-pk model>.<uuid-pk model>:
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with self.assertNumQueries(4):
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redwood = House.objects.prefetch_related('rooms__fleas__pets_visited').get(name='Redwood')
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with self.assertNumQueries(0):
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self.assertEqual('Spooky', redwood.rooms.all()[0].fleas.all()[0].pets_visited.all()[0].name)
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