267 lines
9.1 KiB
Python
267 lines
9.1 KiB
Python
from __future__ import unicode_literals
|
|
|
|
from django.db import connection
|
|
from django.test import TestCase
|
|
|
|
from .models import (Bar, Favorites, HiddenPointer, Place, Restaurant, Target,
|
|
UndergroundBar)
|
|
|
|
|
|
class OneToOneRegressionTests(TestCase):
|
|
|
|
def setUp(self):
|
|
self.p1 = Place(name='Demon Dogs', address='944 W. Fullerton')
|
|
self.p1.save()
|
|
self.r1 = Restaurant(place=self.p1, serves_hot_dogs=True, serves_pizza=False)
|
|
self.r1.save()
|
|
self.b1 = Bar(place=self.p1, serves_cocktails=False)
|
|
self.b1.save()
|
|
|
|
def test_reverse_relationship_cache_cascade(self):
|
|
"""
|
|
Regression test for #9023: accessing the reverse relationship shouldn't
|
|
result in a cascading delete().
|
|
"""
|
|
bar = UndergroundBar.objects.create(place=self.p1, serves_cocktails=False)
|
|
|
|
# The bug in #9023: if you access the one-to-one relation *before*
|
|
# setting to None and deleting, the cascade happens anyway.
|
|
self.p1.undergroundbar
|
|
bar.place.name = 'foo'
|
|
bar.place = None
|
|
bar.save()
|
|
self.p1.delete()
|
|
|
|
self.assertEqual(Place.objects.all().count(), 0)
|
|
self.assertEqual(UndergroundBar.objects.all().count(), 1)
|
|
|
|
def test_create_models_m2m(self):
|
|
"""
|
|
Regression test for #1064 and #1506
|
|
|
|
Check that we create models via the m2m relation if the remote model
|
|
has a OneToOneField.
|
|
"""
|
|
f = Favorites(name='Fred')
|
|
f.save()
|
|
f.restaurants = [self.r1]
|
|
self.assertQuerysetEqual(
|
|
f.restaurants.all(),
|
|
['<Restaurant: Demon Dogs the restaurant>']
|
|
)
|
|
|
|
def test_reverse_object_cache(self):
|
|
"""
|
|
Regression test for #7173
|
|
|
|
Check that the name of the cache for the reverse object is correct.
|
|
"""
|
|
self.assertEqual(self.p1.restaurant, self.r1)
|
|
self.assertEqual(self.p1.bar, self.b1)
|
|
|
|
def test_related_object_cache(self):
|
|
""" Regression test for #6886 (the related-object cache) """
|
|
|
|
# Look up the objects again so that we get "fresh" objects
|
|
p = Place.objects.get(name="Demon Dogs")
|
|
r = p.restaurant
|
|
|
|
# Accessing the related object again returns the exactly same object
|
|
self.assertTrue(p.restaurant is r)
|
|
|
|
# But if we kill the cache, we get a new object
|
|
del p._restaurant_cache
|
|
self.assertFalse(p.restaurant is r)
|
|
|
|
# Reassigning the Restaurant object results in an immediate cache update
|
|
# We can't use a new Restaurant because that'll violate one-to-one, but
|
|
# with a new *instance* the is test below will fail if #6886 regresses.
|
|
r2 = Restaurant.objects.get(pk=r.pk)
|
|
p.restaurant = r2
|
|
self.assertTrue(p.restaurant is r2)
|
|
|
|
# Assigning None succeeds if field is null=True.
|
|
ug_bar = UndergroundBar.objects.create(place=p, serves_cocktails=False)
|
|
ug_bar.place = None
|
|
self.assertTrue(ug_bar.place is None)
|
|
|
|
# Assigning None fails: Place.restaurant is null=False
|
|
self.assertRaises(ValueError, setattr, p, 'restaurant', None)
|
|
|
|
# You also can't assign an object of the wrong type here
|
|
self.assertRaises(ValueError, setattr, p, 'restaurant', p)
|
|
|
|
# Creation using keyword argument should cache the related object.
|
|
p = Place.objects.get(name="Demon Dogs")
|
|
r = Restaurant(place=p)
|
|
self.assertTrue(r.place is p)
|
|
|
|
# Creation using keyword argument and unsaved related instance (#8070).
|
|
p = Place()
|
|
r = Restaurant(place=p)
|
|
self.assertTrue(r.place is p)
|
|
|
|
# Creation using attname keyword argument and an id will cause the related
|
|
# object to be fetched.
|
|
p = Place.objects.get(name="Demon Dogs")
|
|
r = Restaurant(place_id=p.id)
|
|
self.assertFalse(r.place is p)
|
|
self.assertEqual(r.place, p)
|
|
|
|
def test_filter_one_to_one_relations(self):
|
|
"""
|
|
Regression test for #9968
|
|
|
|
filtering reverse one-to-one relations with primary_key=True was
|
|
misbehaving. We test both (primary_key=True & False) cases here to
|
|
prevent any reappearance of the problem.
|
|
"""
|
|
Target.objects.create()
|
|
|
|
self.assertQuerysetEqual(
|
|
Target.objects.filter(pointer=None),
|
|
['<Target: Target object>']
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Target.objects.exclude(pointer=None),
|
|
[]
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Target.objects.filter(second_pointer=None),
|
|
['<Target: Target object>']
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Target.objects.exclude(second_pointer=None),
|
|
[]
|
|
)
|
|
|
|
def test_reverse_object_does_not_exist_cache(self):
|
|
"""
|
|
Regression for #13839 and #17439.
|
|
|
|
DoesNotExist on a reverse one-to-one relation is cached.
|
|
"""
|
|
p = Place(name='Zombie Cats', address='Not sure')
|
|
p.save()
|
|
with self.assertNumQueries(1):
|
|
with self.assertRaises(Restaurant.DoesNotExist):
|
|
p.restaurant
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(Restaurant.DoesNotExist):
|
|
p.restaurant
|
|
|
|
def test_reverse_object_cached_when_related_is_accessed(self):
|
|
"""
|
|
Regression for #13839 and #17439.
|
|
|
|
The target of a one-to-one relation is cached
|
|
when the origin is accessed through the reverse relation.
|
|
"""
|
|
# Use a fresh object without caches
|
|
r = Restaurant.objects.get(pk=self.r1.pk)
|
|
p = r.place
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(p.restaurant, r)
|
|
|
|
def test_related_object_cached_when_reverse_is_accessed(self):
|
|
"""
|
|
Regression for #13839 and #17439.
|
|
|
|
The origin of a one-to-one relation is cached
|
|
when the target is accessed through the reverse relation.
|
|
"""
|
|
# Use a fresh object without caches
|
|
p = Place.objects.get(pk=self.p1.pk)
|
|
r = p.restaurant
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(r.place, p)
|
|
|
|
def test_reverse_object_cached_when_related_is_set(self):
|
|
"""
|
|
Regression for #13839 and #17439.
|
|
|
|
The target of a one-to-one relation is always cached.
|
|
"""
|
|
p = Place(name='Zombie Cats', address='Not sure')
|
|
p.save()
|
|
self.r1.place = p
|
|
self.r1.save()
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(p.restaurant, self.r1)
|
|
|
|
def test_reverse_object_cached_when_related_is_unset(self):
|
|
"""
|
|
Regression for #13839 and #17439.
|
|
|
|
The target of a one-to-one relation is always cached.
|
|
"""
|
|
b = UndergroundBar(place=self.p1, serves_cocktails=True)
|
|
b.save()
|
|
with self.assertNumQueries(0):
|
|
self.assertEqual(self.p1.undergroundbar, b)
|
|
b.place = None
|
|
b.save()
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(UndergroundBar.DoesNotExist):
|
|
self.p1.undergroundbar
|
|
|
|
def test_get_reverse_on_unsaved_object(self):
|
|
"""
|
|
Regression for #18153 and #19089.
|
|
|
|
Accessing the reverse relation on an unsaved object
|
|
always raises an exception.
|
|
"""
|
|
p = Place()
|
|
|
|
# When there's no instance of the origin of the one-to-one
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(UndergroundBar.DoesNotExist):
|
|
p.undergroundbar
|
|
|
|
UndergroundBar.objects.create()
|
|
|
|
# When there's one instance of the origin
|
|
# (p.undergroundbar used to return that instance)
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(UndergroundBar.DoesNotExist):
|
|
p.undergroundbar
|
|
|
|
# Several instances of the origin are only possible if database allows
|
|
# inserting multiple NULL rows for a unique constraint
|
|
if connection.features.ignores_nulls_in_unique_constraints:
|
|
UndergroundBar.objects.create()
|
|
|
|
# When there are several instances of the origin
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(UndergroundBar.DoesNotExist):
|
|
p.undergroundbar
|
|
|
|
def test_set_reverse_on_unsaved_object(self):
|
|
"""
|
|
Writing to the reverse relation on an unsaved object
|
|
is impossible too.
|
|
"""
|
|
p = Place()
|
|
b = UndergroundBar.objects.create()
|
|
with self.assertNumQueries(0):
|
|
with self.assertRaises(ValueError):
|
|
p.undergroundbar = b
|
|
|
|
def test_nullable_o2o_delete(self):
|
|
u = UndergroundBar.objects.create(place=self.p1)
|
|
u.place_id = None
|
|
u.save()
|
|
self.p1.delete()
|
|
self.assertTrue(UndergroundBar.objects.filter(pk=u.pk).exists())
|
|
self.assertIsNone(UndergroundBar.objects.get(pk=u.pk).place)
|
|
|
|
def test_hidden_accessor(self):
|
|
"""
|
|
When a '+' ending related name is specified no reverse accessor should
|
|
be added to the related model.
|
|
"""
|
|
self.assertFalse(
|
|
hasattr(Target, HiddenPointer._meta.get_field('target').related.get_accessor_name())
|
|
)
|