--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/null_fk_ordering/models.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,49 @@
+"""
+Regression tests for proper working of ForeignKey(null=True). Tests these bugs:
+
+    * #7512: including a nullable foreign key reference in Meta ordering has un
+xpected results
+
+"""
+
+from django.db import models
+
+# The first two models represent a very simple null FK ordering case.
+class Author(models.Model):
+    name = models.CharField(max_length=150)
+
+class Article(models.Model):
+    title = models.CharField(max_length=150)
+    author = models.ForeignKey(Author, null=True)
+
+    def __unicode__(self):
+        return u'Article titled: %s' % (self.title, )
+
+    class Meta:
+        ordering = ['author__name', ]
+
+
+# These following 4 models represent a far more complex ordering case.
+class SystemInfo(models.Model):
+    system_name = models.CharField(max_length=32)
+
+class Forum(models.Model):
+    system_info = models.ForeignKey(SystemInfo)
+    forum_name = models.CharField(max_length=32)
+
+class Post(models.Model):
+    forum = models.ForeignKey(Forum, null=True)
+    title = models.CharField(max_length=32)
+
+    def __unicode__(self):
+        return self.title
+
+class Comment(models.Model):
+    post = models.ForeignKey(Post, null=True)
+    comment_text = models.CharField(max_length=250)
+
+    class Meta:
+        ordering = ['post__forum__system_info__system_name', 'comment_text']
+
+    def __unicode__(self):
+        return self.comment_text