--- a/thirdparty/google_appengine/lib/django/tests/modeltests/many_to_one_null/models.py	Sun Sep 06 23:31:53 2009 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,124 +0,0 @@
-"""
-16. Many-to-one relationships that can be null
-
-To define a many-to-one relationship that can have a null foreign key, use
-``ForeignKey()`` with ``null=True`` .
-"""
-
-from django.db import models
-
-class Reporter(models.Model):
-    name = models.CharField(maxlength=30)
-
-    def __str__(self):
-        return self.name
-
-class Article(models.Model):
-    headline = models.CharField(maxlength=100)
-    reporter = models.ForeignKey(Reporter, null=True)
-
-    class Meta:
-        ordering = ('headline',)
-
-    def __str__(self):
-        return self.headline
-
-__test__ = {'API_TESTS':"""
-# Create a Reporter.
->>> r = Reporter(name='John Smith')
->>> r.save()
-
-# Create an Article.
->>> a = Article(headline="First", reporter=r)
->>> a.save()
-
->>> a.reporter.id
-1
-
->>> a.reporter
-<Reporter: John Smith>
-
-# Article objects have access to their related Reporter objects.
->>> r = a.reporter
-
-# Create an Article via the Reporter object.
->>> a2 = r.article_set.create(headline="Second")
->>> a2
-<Article: Second>
->>> a2.reporter.id
-1
-
-# Reporter objects have access to their related Article objects.
->>> r.article_set.all()
-[<Article: First>, <Article: Second>]
->>> r.article_set.filter(headline__startswith='Fir')
-[<Article: First>]
->>> r.article_set.count()
-2
-
-# Create an Article with no Reporter by passing "reporter=None".
->>> a3 = Article(headline="Third", reporter=None)
->>> a3.save()
->>> a3.id
-3
->>> print a3.reporter
-None
-
-# Need to reget a3 to refresh the cache
->>> a3 = Article.objects.get(pk=3)
->>> print a3.reporter.id
-Traceback (most recent call last):
-    ...
-AttributeError: 'NoneType' object has no attribute 'id'
-
-# Accessing an article's 'reporter' attribute returns None
-# if the reporter is set to None.
->>> print a3.reporter
-None
-
-# To retrieve the articles with no reporters set, use "reporter__isnull=True".
->>> Article.objects.filter(reporter__isnull=True)
-[<Article: Third>]
-
-# Set the reporter for the Third article
->>> r.article_set.add(a3)
->>> r.article_set.all()
-[<Article: First>, <Article: Second>, <Article: Third>]
-
-# Remove an article from the set, and check that it was removed.
->>> r.article_set.remove(a3)
->>> r.article_set.all()
-[<Article: First>, <Article: Second>]
->>> Article.objects.filter(reporter__isnull=True)
-[<Article: Third>]
-
-# Create another article and reporter
->>> r2 = Reporter(name='Paul Jones')
->>> r2.save()
->>> a4 = r2.article_set.create(headline='Fourth')
->>> r2.article_set.all()
-[<Article: Fourth>]
-
-# Try to remove a4 from a set it does not belong to
->>> r.article_set.remove(a4)
-Traceback (most recent call last):
-...
-DoesNotExist: <Article: Fourth> is not related to <Reporter: John Smith>.
-
->>> r2.article_set.all()
-[<Article: Fourth>]
-
-# Use descriptor assignment to allocate ForeignKey. Null is legal, so
-# existing members of set that are not in the assignment set are set null
->>> r2.article_set = [a2, a3]
->>> r2.article_set.all()
-[<Article: Second>, <Article: Third>]
-
-# Clear the rest of the set
->>> r.article_set.clear()
->>> r.article_set.all()
-[]
->>> Article.objects.filter(reporter__isnull=True)
-[<Article: First>, <Article: Fourth>]
-
-"""}