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923f78f504
This fixes a broad class of bugs involving filters that look for missing related models and fields. Most of them don't seem to have been reported (the added tests cover the root cause). The exception is that this has also fixed #9868. git-svn-id: http://code.djangoproject.com/svn/django/trunk@9979 bcc190cf-cafb-0310-a4f2-bffc1f526a37
145 lines
4.1 KiB
Python
145 lines
4.1 KiB
Python
from django.db import models
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class Place(models.Model):
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name = models.CharField(max_length=50)
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address = models.CharField(max_length=80)
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def __unicode__(self):
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return u"%s the place" % self.name
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class Restaurant(models.Model):
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place = models.OneToOneField(Place)
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serves_hot_dogs = models.BooleanField()
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serves_pizza = models.BooleanField()
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def __unicode__(self):
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return u"%s the restaurant" % self.place.name
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class Bar(models.Model):
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place = models.OneToOneField(Place)
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serves_cocktails = models.BooleanField()
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def __unicode__(self):
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return u"%s the bar" % self.place.name
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class UndergroundBar(models.Model):
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place = models.OneToOneField(Place, null=True)
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serves_cocktails = models.BooleanField()
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class Favorites(models.Model):
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name = models.CharField(max_length = 50)
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restaurants = models.ManyToManyField(Restaurant)
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def __unicode__(self):
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return u"Favorites for %s" % self.name
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class Target(models.Model):
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pass
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class Pointer(models.Model):
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other = models.OneToOneField(Target, primary_key=True)
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class Pointer2(models.Model):
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other = models.OneToOneField(Target)
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__test__ = {'API_TESTS':"""
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# Regression test for #1064 and #1506: Check that we create models via the m2m
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# relation if the remote model has a OneToOneField.
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>>> p1 = Place(name='Demon Dogs', address='944 W. Fullerton')
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>>> p1.save()
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>>> r = Restaurant(place=p1, serves_hot_dogs=True, serves_pizza=False)
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>>> r.save()
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>>> f = Favorites(name = 'Fred')
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>>> f.save()
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>>> f.restaurants = [r]
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>>> f.restaurants.all()
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[<Restaurant: Demon Dogs the restaurant>]
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# Regression test for #7173: Check that the name of the cache for the
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# reverse object is correct.
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>>> b = Bar(place=p1, serves_cocktails=False)
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>>> b.save()
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>>> p1.restaurant
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<Restaurant: Demon Dogs the restaurant>
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>>> p1.bar
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<Bar: Demon Dogs the bar>
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#
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# Regression test for #6886 (the related-object cache)
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#
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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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>>> p.restaurant is r
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True
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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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>>> p.restaurant is r
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False
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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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>>> p.restaurant is r2
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True
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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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>>> ug_bar.place is None
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True
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# Assigning None fails: Place.restaurant is null=False
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>>> p.restaurant = None
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Traceback (most recent call last):
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...
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ValueError: Cannot assign None: "Place.restaurant" does not allow null values.
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# You also can't assign an object of the wrong type here
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>>> p.restaurant = p
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Traceback (most recent call last):
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...
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ValueError: Cannot assign "<Place: Demon Dogs the place>": "Place.restaurant" must be a "Restaurant" instance.
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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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>>> r.place is p
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True
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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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>>> r.place is p
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True
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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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>>> r.place is p
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False
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>>> r.place == p
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True
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# Regression test for #9968: filtering reverse one-to-one relations with
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# primary_key=True was misbehaving. We test both (primary_key=True & False)
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# cases here to prevent any reappearance of the problem.
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>>> _ = Target.objects.create()
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>>> Target.objects.filter(pointer=None)
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[<Target: Target object>]
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>>> Target.objects.exclude(pointer=None)
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[]
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>>> Target.objects.filter(pointer2=None)
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[<Target: Target object>]
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>>> Target.objects.exclude(pointer2=None)
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[]
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"""}
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