def test_foreign_key(self):
order = Order.objects.get(pk=self.order.pk)
with self.assert_lazy_error('Order.purchaser'):
with no_lazy_queries():
order.purchaser
order = Order.objects.select_related('purchaser').get(pk=self.order.pk)
with self.assertNumQueries(0):
with no_lazy_queries():
self.assertEqual(order.purchaser, self.account)
def test_one_to_one(self):
profile = Profile.objects.get(pk=self.profile.pk)
with self.assert_lazy_error('Profile.account'):
with no_lazy_queries():
profile.account
profile = (Profile.objects
.select_related('account')
.get(pk=self.profile.pk))
with self.assertNumQueries(0):
with no_lazy_queries():
self.assertEqual(profile.account, self.account)
def test_reverse_one_to_one(self):
account = Account.objects.get(pk=self.account.pk)
with self.assert_lazy_error('Account.profile'):
with no_lazy_queries():
account.profile
account = (Account.objects
.select_related('profile')
.get(pk=self.account.pk))
with self.assertNumQueries(0):
with no_lazy_queries():
self.assertEqual(account.profile, self.profile)
