mirror of
https://github.com/django/django.git
synced 2024-11-19 16:04:13 +00:00
fa89fdcd6b
A custom manager on a related object that filtered away objects would prevent those objects being deleted via the relation. This is now fixed. git-svn-id: http://code.djangoproject.com/svn/django/trunk@10104 bcc190cf-cafb-0310-a4f2-bffc1f526a37
83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
"""
|
|
Regression tests for custom manager classes.
|
|
"""
|
|
|
|
from django.db import models
|
|
|
|
class RestrictedManager(models.Manager):
|
|
"""
|
|
A manager that filters out non-public instances.
|
|
"""
|
|
def get_query_set(self):
|
|
return super(RestrictedManager, self).get_query_set().filter(is_public=True)
|
|
|
|
class RelatedModel(models.Model):
|
|
name = models.CharField(max_length=50)
|
|
|
|
def __unicode__(self):
|
|
return self.name
|
|
|
|
class RestrictedModel(models.Model):
|
|
name = models.CharField(max_length=50)
|
|
is_public = models.BooleanField(default=False)
|
|
related = models.ForeignKey(RelatedModel)
|
|
|
|
objects = RestrictedManager()
|
|
plain_manager = models.Manager()
|
|
|
|
def __unicode__(self):
|
|
return self.name
|
|
|
|
class OneToOneRestrictedModel(models.Model):
|
|
name = models.CharField(max_length=50)
|
|
is_public = models.BooleanField(default=False)
|
|
related = models.OneToOneField(RelatedModel)
|
|
|
|
objects = RestrictedManager()
|
|
plain_manager = models.Manager()
|
|
|
|
def __unicode__(self):
|
|
return self.name
|
|
|
|
__test__ = {"tests": """
|
|
Even though the default manager filters out some records, we must still be able
|
|
to save (particularly, save by updating existing records) those filtered
|
|
instances. This is a regression test for #8990, #9527
|
|
>>> related = RelatedModel.objects.create(name="xyzzy")
|
|
>>> obj = RestrictedModel.objects.create(name="hidden", related=related)
|
|
>>> obj.name = "still hidden"
|
|
>>> obj.save()
|
|
|
|
# If the hidden object wasn't seen during the save process, there would now be
|
|
# two objects in the database.
|
|
>>> RestrictedModel.plain_manager.count()
|
|
1
|
|
|
|
Deleting related objects should also not be distracted by a restricted manager
|
|
on the related object. This is a regression test for #2698.
|
|
>>> RestrictedModel.plain_manager.all().delete()
|
|
>>> for name, public in (('one', True), ('two', False), ('three', False)):
|
|
... _ = RestrictedModel.objects.create(name=name, is_public=public, related=related)
|
|
|
|
# Reload the RelatedModel instance, just to avoid any instance artifacts.
|
|
>>> obj = RelatedModel.objects.get(name="xyzzy")
|
|
>>> obj.delete()
|
|
|
|
# All of the RestrictedModel instances should have been deleted, since they
|
|
# *all* pointed to the RelatedModel. If the default manager is used, only the
|
|
# public one will be deleted.
|
|
>>> RestrictedModel.plain_manager.all()
|
|
[]
|
|
|
|
# The same test case as the last one, but for one-to-one models, which are
|
|
# implemented slightly different internally, so it's a different code path.
|
|
>>> obj = RelatedModel.objects.create(name="xyzzy")
|
|
>>> _ = OneToOneRestrictedModel.objects.create(name="foo", is_public=False, related=obj)
|
|
>>> obj = RelatedModel.objects.get(name="xyzzy")
|
|
>>> obj.delete()
|
|
>>> OneToOneRestrictedModel.plain_manager.all()
|
|
[]
|
|
|
|
"""
|
|
}
|