[1.0.X] Fixed #2698 -- Fixed deleting in the presence of custom managers.

A custom manager on a related object that filtered away objects would prevent
those objects being deleted via the relation. This is now fixed.

Backport of r10104 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10106 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/custom_managers_regress/models.py

@@ -11,9 +11,27 @@ class RestrictedManager(models.Manager):
     def get_query_set(self):
         return super(RestrictedManager, self).get_query_set().filter(is_public=True)
 
-class RestrictedClass(models.Model):
+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()
@@ -24,15 +42,41 @@ class RestrictedClass(models.Model):
 __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 #FIXME.
->>> obj = RestrictedClass.objects.create(name="hidden")
+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.
->>> RestrictedClass.plain_manager.count()
+>>> 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()
+[]
+
 """
 }