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from __future__ import absolute_import
from django.test import TestCase
from .models import Tournament, Pool, PoolStyle
class ExistingRelatedInstancesTests(TestCase):
fixtures = ['tournament.json']
def test_foreign_key(self):
with self.assertNumQueries(2):
tournament = Tournament.objects.get(pk=1)
pool = tournament.pool_set.all()[0]
self.assertIs(tournament, pool.tournament)
def test_foreign_key_prefetch_related(self):
with self.assertNumQueries(2):
tournament = (Tournament.objects.prefetch_related('pool_set').get(pk=1))
pool = tournament.pool_set.all()[0]
self.assertIs(tournament, pool.tournament)
def test_foreign_key_multiple_prefetch(self):
with self.assertNumQueries(2):
tournaments = list(Tournament.objects.prefetch_related('pool_set'))
pool1 = tournaments[0].pool_set.all()[0]
self.assertIs(tournaments[0], pool1.tournament)
pool2 = tournaments[1].pool_set.all()[0]
self.assertIs(tournaments[1], pool2.tournament)
def test_one_to_one(self):
with self.assertNumQueries(2):
style = PoolStyle.objects.get(pk=1)
pool = style.pool
self.assertIs(style, pool.poolstyle)
def test_one_to_one_select_related(self):
with self.assertNumQueries(1):
style = PoolStyle.objects.select_related('pool').get(pk=1)
pool = style.pool
self.assertIs(style, pool.poolstyle)
def test_one_to_one_multi_select_related(self):
with self.assertNumQueries(1):
poolstyles = list(PoolStyle.objects.select_related('pool'))
self.assertIs(poolstyles[0], poolstyles[0].pool.poolstyle)
self.assertIs(poolstyles[1], poolstyles[1].pool.poolstyle)
def test_one_to_one_prefetch_related(self):
with self.assertNumQueries(2):
style = PoolStyle.objects.prefetch_related('pool').get(pk=1)
pool = style.pool
self.assertIs(style, pool.poolstyle)
def test_one_to_one_multi_prefetch_related(self):
with self.assertNumQueries(2):
poolstyles = list(PoolStyle.objects.prefetch_related('pool'))
self.assertIs(poolstyles[0], poolstyles[0].pool.poolstyle)
self.assertIs(poolstyles[1], poolstyles[1].pool.poolstyle)
def test_reverse_one_to_one(self):
with self.assertNumQueries(2):
pool = Pool.objects.get(pk=2)
style = pool.poolstyle
self.assertIs(pool, style.pool)
def test_reverse_one_to_one_select_related(self):
with self.assertNumQueries(1):
pool = Pool.objects.select_related('poolstyle').get(pk=2)
style = pool.poolstyle
self.assertIs(pool, style.pool)
def test_reverse_one_to_one_prefetch_related(self):
with self.assertNumQueries(2):
pool = Pool.objects.prefetch_related('poolstyle').get(pk=2)
style = pool.poolstyle
self.assertIs(pool, style.pool)
def test_reverse_one_to_one_multi_select_related(self):
with self.assertNumQueries(1):
pools = list(Pool.objects.select_related('poolstyle'))
self.assertIs(pools[1], pools[1].poolstyle.pool)
self.assertIs(pools[2], pools[2].poolstyle.pool)
def test_reverse_one_to_one_multi_prefetch_related(self):
with self.assertNumQueries(2):
pools = list(Pool.objects.prefetch_related('poolstyle'))
self.assertIs(pools[1], pools[1].poolstyle.pool)
self.assertIs(pools[2], pools[2].poolstyle.pool)
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