From 6671b8b1cd388ccb16a734e9147f0c73638ebf48 Mon Sep 17 00:00:00 2001
From: Malcolm Tredinnick <malcolm.tredinnick@gmail.com>
Date: Wed, 25 Mar 2009 04:41:40 +0000
Subject: [PATCH] Fixed a breakage with ManyToManyFields in admin caused by
 r10139.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10170 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/db/models/fields/related.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 1545c73f580..f986eea75bb 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -644,6 +644,14 @@ class ManyToManyRel(object):
         self.multiple = True
         self.through = through
 
+    def get_related_field(self):
+        """
+        Returns the field in the to' object to which this relationship is tied
+        (this is always the primary key on the target model). Provided for
+        symmetry with ManyToOneRel.
+        """
+        return self.to._meta.pk
+
 class ForeignKey(RelatedField, Field):
     empty_strings_allowed = False
     def __init__(self, to, to_field=None, rel_class=ManyToOneRel, **kwargs):