diff -r 5ff1fc726848 -r c6bca38c1cbf parts/django/tests/regressiontests/m2m_through_regress/models.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/m2m_through_regress/models.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,55 @@
+from datetime import datetime
+
+from django.contrib.auth.models import User
+from django.core import management
+from django.db import models
+
+
+# Forward declared intermediate model
+class Membership(models.Model):
+    person = models.ForeignKey('Person')
+    group = models.ForeignKey('Group')
+    price = models.IntegerField(default=100)
+
+    def __unicode__(self):
+        return "%s is a member of %s" % (self.person.name, self.group.name)
+
+# using custom id column to test ticket #11107
+class UserMembership(models.Model):
+    id = models.AutoField(db_column='usermembership_id', primary_key=True)
+    user = models.ForeignKey(User)
+    group = models.ForeignKey('Group')
+    price = models.IntegerField(default=100)
+
+    def __unicode__(self):
+        return "%s is a user and member of %s" % (self.user.username, self.group.name)
+
+class Person(models.Model):
+    name = models.CharField(max_length=128)
+
+    def __unicode__(self):
+        return self.name
+
+class Group(models.Model):
+    name = models.CharField(max_length=128)
+    # Membership object defined as a class
+    members = models.ManyToManyField(Person, through=Membership)
+    user_members = models.ManyToManyField(User, through='UserMembership')
+
+    def __unicode__(self):
+        return self.name
+
+# A set of models that use an non-abstract inherited model as the 'through' model.
+class A(models.Model):
+    a_text = models.CharField(max_length=20)
+
+class ThroughBase(models.Model):
+    a = models.ForeignKey(A)
+    b = models.ForeignKey('B')
+
+class Through(ThroughBase):
+    extra = models.CharField(max_length=20)
+
+class B(models.Model):
+    b_text = models.CharField(max_length=20)
+    a_list = models.ManyToManyField(A, through=Through)