129 lines
5.6 KiB
Python
129 lines
5.6 KiB
Python
from __future__ import absolute_import
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from django.test import TestCase
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from .models import Tournament, Organiser, Pool, PoolStyle
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class ExistingRelatedInstancesTests(TestCase):
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fixtures = ['tournament.json']
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def test_foreign_key(self):
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with self.assertNumQueries(2):
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tournament = Tournament.objects.get(pk=1)
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pool = tournament.pool_set.all()[0]
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self.assertIs(tournament, pool.tournament)
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def test_foreign_key_prefetch_related(self):
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with self.assertNumQueries(2):
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tournament = (Tournament.objects.prefetch_related('pool_set').get(pk=1))
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pool = tournament.pool_set.all()[0]
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self.assertIs(tournament, pool.tournament)
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def test_foreign_key_multiple_prefetch(self):
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with self.assertNumQueries(2):
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tournaments = list(Tournament.objects.prefetch_related('pool_set').order_by('pk'))
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pool1 = tournaments[0].pool_set.all()[0]
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self.assertIs(tournaments[0], pool1.tournament)
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pool2 = tournaments[1].pool_set.all()[0]
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self.assertIs(tournaments[1], pool2.tournament)
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def test_queryset_or(self):
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tournament_1 = Tournament.objects.get(pk=1)
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tournament_2 = Tournament.objects.get(pk=2)
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with self.assertNumQueries(1):
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pools = tournament_1.pool_set.all() | tournament_2.pool_set.all()
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related_objects = set(pool.tournament for pool in pools)
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self.assertEqual(related_objects, set((tournament_1, tournament_2)))
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def test_queryset_or_different_cached_items(self):
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tournament = Tournament.objects.get(pk=1)
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organiser = Organiser.objects.get(pk=1)
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with self.assertNumQueries(1):
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pools = tournament.pool_set.all() | organiser.pool_set.all()
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first = pools.filter(pk=1)[0]
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self.assertIs(first.tournament, tournament)
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self.assertIs(first.organiser, organiser)
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def test_queryset_or_only_one_with_precache(self):
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tournament_1 = Tournament.objects.get(pk=1)
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tournament_2 = Tournament.objects.get(pk=2)
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# 2 queries here as pool id 3 has tournament 2, which is not cached
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with self.assertNumQueries(2):
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pools = tournament_1.pool_set.all() | Pool.objects.filter(pk=3)
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related_objects = set(pool.tournament for pool in pools)
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self.assertEqual(related_objects, set((tournament_1, tournament_2)))
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# and the other direction
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with self.assertNumQueries(2):
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pools = Pool.objects.filter(pk=3) | tournament_1.pool_set.all()
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related_objects = set(pool.tournament for pool in pools)
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self.assertEqual(related_objects, set((tournament_1, tournament_2)))
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def test_queryset_and(self):
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tournament = Tournament.objects.get(pk=1)
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organiser = Organiser.objects.get(pk=1)
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with self.assertNumQueries(1):
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pools = tournament.pool_set.all() & organiser.pool_set.all()
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first = pools.filter(pk=1)[0]
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self.assertIs(first.tournament, tournament)
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self.assertIs(first.organiser, organiser)
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def test_one_to_one(self):
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with self.assertNumQueries(2):
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style = PoolStyle.objects.get(pk=1)
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pool = style.pool
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self.assertIs(style, pool.poolstyle)
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def test_one_to_one_select_related(self):
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with self.assertNumQueries(1):
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style = PoolStyle.objects.select_related('pool').get(pk=1)
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pool = style.pool
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self.assertIs(style, pool.poolstyle)
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def test_one_to_one_multi_select_related(self):
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with self.assertNumQueries(1):
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poolstyles = list(PoolStyle.objects.select_related('pool').order_by('pk'))
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self.assertIs(poolstyles[0], poolstyles[0].pool.poolstyle)
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self.assertIs(poolstyles[1], poolstyles[1].pool.poolstyle)
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def test_one_to_one_prefetch_related(self):
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with self.assertNumQueries(2):
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style = PoolStyle.objects.prefetch_related('pool').get(pk=1)
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pool = style.pool
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self.assertIs(style, pool.poolstyle)
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def test_one_to_one_multi_prefetch_related(self):
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with self.assertNumQueries(2):
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poolstyles = list(PoolStyle.objects.prefetch_related('pool').order_by('pk'))
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self.assertIs(poolstyles[0], poolstyles[0].pool.poolstyle)
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self.assertIs(poolstyles[1], poolstyles[1].pool.poolstyle)
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def test_reverse_one_to_one(self):
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with self.assertNumQueries(2):
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pool = Pool.objects.get(pk=2)
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style = pool.poolstyle
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self.assertIs(pool, style.pool)
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def test_reverse_one_to_one_select_related(self):
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with self.assertNumQueries(1):
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pool = Pool.objects.select_related('poolstyle').get(pk=2)
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style = pool.poolstyle
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self.assertIs(pool, style.pool)
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def test_reverse_one_to_one_prefetch_related(self):
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with self.assertNumQueries(2):
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pool = Pool.objects.prefetch_related('poolstyle').get(pk=2)
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style = pool.poolstyle
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self.assertIs(pool, style.pool)
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def test_reverse_one_to_one_multi_select_related(self):
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with self.assertNumQueries(1):
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pools = list(Pool.objects.select_related('poolstyle').order_by('pk'))
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self.assertIs(pools[1], pools[1].poolstyle.pool)
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self.assertIs(pools[2], pools[2].poolstyle.pool)
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def test_reverse_one_to_one_multi_prefetch_related(self):
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with self.assertNumQueries(2):
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pools = list(Pool.objects.prefetch_related('poolstyle').order_by('pk'))
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self.assertIs(pools[1], pools[1].poolstyle.pool)
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self.assertIs(pools[2], pools[2].poolstyle.pool)
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