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135 lines
3.6 KiB
Python
135 lines
3.6 KiB
Python
from __future__ import unicode_literals
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from django.db import models
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from django.utils.encoding import python_2_unicode_compatible
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@python_2_unicode_compatible
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class R(models.Model):
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is_default = models.BooleanField(default=False)
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def __str__(self):
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return "%s" % self.pk
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get_default_r = lambda: R.objects.get_or_create(is_default=True)[0]
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class S(models.Model):
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r = models.ForeignKey(R)
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class T(models.Model):
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s = models.ForeignKey(S)
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class U(models.Model):
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t = models.ForeignKey(T)
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class RChild(R):
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pass
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class A(models.Model):
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name = models.CharField(max_length=30)
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auto = models.ForeignKey(R, related_name="auto_set")
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auto_nullable = models.ForeignKey(R, null=True,
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related_name='auto_nullable_set')
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setvalue = models.ForeignKey(R, on_delete=models.SET(get_default_r),
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related_name='setvalue')
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setnull = models.ForeignKey(R, on_delete=models.SET_NULL, null=True,
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related_name='setnull_set')
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setdefault = models.ForeignKey(R, on_delete=models.SET_DEFAULT,
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default=get_default_r, related_name='setdefault_set')
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setdefault_none = models.ForeignKey(R, on_delete=models.SET_DEFAULT,
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default=None, null=True, related_name='setnull_nullable_set')
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cascade = models.ForeignKey(R, on_delete=models.CASCADE,
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related_name='cascade_set')
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cascade_nullable = models.ForeignKey(R, on_delete=models.CASCADE, null=True,
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related_name='cascade_nullable_set')
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protect = models.ForeignKey(R, on_delete=models.PROTECT, null=True)
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donothing = models.ForeignKey(R, on_delete=models.DO_NOTHING, null=True,
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related_name='donothing_set')
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child = models.ForeignKey(RChild, related_name="child")
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child_setnull = models.ForeignKey(RChild, on_delete=models.SET_NULL, null=True,
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related_name="child_setnull")
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# A OneToOneField is just a ForeignKey unique=True, so we don't duplicate
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# all the tests; just one smoke test to ensure on_delete works for it as
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# well.
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o2o_setnull = models.ForeignKey(R, null=True,
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on_delete=models.SET_NULL, related_name="o2o_nullable_set")
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def create_a(name):
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a = A(name=name)
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for name in ('auto', 'auto_nullable', 'setvalue', 'setnull', 'setdefault',
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'setdefault_none', 'cascade', 'cascade_nullable', 'protect',
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'donothing', 'o2o_setnull'):
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r = R.objects.create()
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setattr(a, name, r)
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a.child = RChild.objects.create()
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a.child_setnull = RChild.objects.create()
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a.save()
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return a
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class M(models.Model):
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m2m = models.ManyToManyField(R, related_name="m_set")
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m2m_through = models.ManyToManyField(R, through="MR",
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related_name="m_through_set")
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m2m_through_null = models.ManyToManyField(R, through="MRNull",
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related_name="m_through_null_set")
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class MR(models.Model):
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m = models.ForeignKey(M)
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r = models.ForeignKey(R)
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class MRNull(models.Model):
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m = models.ForeignKey(M)
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r = models.ForeignKey(R, null=True, on_delete=models.SET_NULL)
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class Avatar(models.Model):
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desc = models.TextField(null=True)
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class User(models.Model):
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avatar = models.ForeignKey(Avatar, null=True)
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class HiddenUser(models.Model):
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r = models.ForeignKey(R, related_name="+")
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class HiddenUserProfile(models.Model):
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user = models.ForeignKey(HiddenUser)
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class M2MTo(models.Model):
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pass
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class M2MFrom(models.Model):
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m2m = models.ManyToManyField(M2MTo)
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class Parent(models.Model):
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pass
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class Child(Parent):
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pass
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class Base(models.Model):
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pass
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class RelToBase(models.Model):
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base = models.ForeignKey(Base, on_delete=models.DO_NOTHING)
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