131 lines
4.6 KiB
Python
131 lines
4.6 KiB
Python
from django.test import TestCase
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from regressiontests.one_to_one_regress.models import *
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class OneToOneRegressionTests(TestCase):
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def setUp(self):
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self.p1 = Place(name='Demon Dogs', address='944 W. Fullerton')
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self.p1.save()
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self.r1 = Restaurant(place=self.p1, serves_hot_dogs=True, serves_pizza=False)
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self.r1.save()
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self.b1 = Bar(place=self.p1, serves_cocktails=False)
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self.b1.save()
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def test_reverse_relationship_cache_cascade(self):
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"""
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Regression test for #9023: accessing the reverse relationship shouldn't
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result in a cascading delete().
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"""
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bar = UndergroundBar.objects.create(place=self.p1, serves_cocktails=False)
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# The bug in #9023: if you access the one-to-one relation *before*
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# setting to None and deleting, the cascade happens anyway.
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self.p1.undergroundbar
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bar.place.name='foo'
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bar.place = None
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bar.save()
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self.p1.delete()
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self.assertEqual(Place.objects.all().count(), 0)
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self.assertEqual(UndergroundBar.objects.all().count(), 1)
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def test_create_models_m2m(self):
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"""
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Regression test for #1064 and #1506
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Check that we create models via the m2m relation if the remote model
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has a OneToOneField.
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"""
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f = Favorites(name = 'Fred')
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f.save()
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f.restaurants = [self.r1]
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self.assertQuerysetEqual(
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f.restaurants.all(),
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['<Restaurant: Demon Dogs the restaurant>']
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)
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def test_reverse_object_cache(self):
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"""
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Regression test for #7173
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Check that the name of the cache for the reverse object is correct.
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"""
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self.assertEquals(self.p1.restaurant, self.r1)
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self.assertEquals(self.p1.bar, self.b1)
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def test_related_object_cache(self):
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""" Regression test for #6886 (the related-object cache) """
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# Look up the objects again so that we get "fresh" objects
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p = Place.objects.get(name="Demon Dogs")
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r = p.restaurant
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# Accessing the related object again returns the exactly same object
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self.assertTrue(p.restaurant is r)
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# But if we kill the cache, we get a new object
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del p._restaurant_cache
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self.assertFalse(p.restaurant is r)
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# Reassigning the Restaurant object results in an immediate cache update
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# We can't use a new Restaurant because that'll violate one-to-one, but
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# with a new *instance* the is test below will fail if #6886 regresses.
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r2 = Restaurant.objects.get(pk=r.pk)
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p.restaurant = r2
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self.assertTrue(p.restaurant is r2)
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# Assigning None succeeds if field is null=True.
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ug_bar = UndergroundBar.objects.create(place=p, serves_cocktails=False)
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ug_bar.place = None
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self.assertTrue(ug_bar.place is None)
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# Assigning None fails: Place.restaurant is null=False
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self.assertRaises(ValueError, setattr, p, 'restaurant', None)
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# You also can't assign an object of the wrong type here
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self.assertRaises(ValueError, setattr, p, 'restaurant', p)
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# Creation using keyword argument should cache the related object.
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p = Place.objects.get(name="Demon Dogs")
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r = Restaurant(place=p)
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self.assertTrue(r.place is p)
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# Creation using keyword argument and unsaved related instance (#8070).
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p = Place()
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r = Restaurant(place=p)
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self.assertTrue(r.place is p)
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# Creation using attname keyword argument and an id will cause the related
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# object to be fetched.
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p = Place.objects.get(name="Demon Dogs")
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r = Restaurant(place_id=p.id)
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self.assertFalse(r.place is p)
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self.assertEqual(r.place, p)
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def test_filter_one_to_one_relations(self):
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"""
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Regression test for #9968
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filtering reverse one-to-one relations with primary_key=True was
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misbehaving. We test both (primary_key=True & False) cases here to
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prevent any reappearance of the problem.
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"""
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t = Target.objects.create()
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self.assertQuerysetEqual(
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Target.objects.filter(pointer=None),
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['<Target: Target object>']
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)
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self.assertQuerysetEqual(
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Target.objects.exclude(pointer=None),
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[]
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)
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self.assertQuerysetEqual(
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Target.objects.filter(pointer2=None),
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['<Target: Target object>']
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)
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self.assertQuerysetEqual(
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Target.objects.exclude(pointer2=None),
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[]
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)
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