[1.2.X] Fixed #14471 -- Corrected a regression in the use of methods on custom managers on related querysets. Thanks to Lucky for the report.

Backport of r14389 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14390 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/multiple_database/models.py

@@ -30,7 +30,21 @@ class Person(models.Model):
     class Meta:
         ordering = ('name',)
 
+# This book manager doesn't do anything interesting; it just
+# exists to strip out the 'extra_arg' argument to certain
+# calls. This argument is used to establish that the BookManager
+# is actually getting used when it should be.
+class BookManager(models.Manager):
+    def create(self, *args, **kwargs):
+        kwargs.pop('extra_arg', None)
+        return super(BookManager, self).create(*args, **kwargs)
+
+    def get_or_create(self, *args, **kwargs):
+        kwargs.pop('extra_arg', None)
+        return super(BookManager, self).get_or_create(*args, **kwargs)
+
 class Book(models.Model):
+    objects = BookManager()
     title = models.CharField(max_length=100)
     published = models.DateField()
     authors = models.ManyToManyField(Person)
@@ -60,4 +74,3 @@ class UserProfile(models.Model):
 
     class Meta:
         ordering = ('flavor',)
-