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"""
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
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