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[1.2.X] Migrated many_to_one_null doctests. Thanks to George Sakkis f…

…or the patch.

Backport of r14166 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14172 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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freakboy3742 committed Oct 12, 2010
1 parent 5ecb496 commit 6b1a45289b9605af219111b4cd0a3cb81e876f27
Showing with 84 additions and 105 deletions.
  1. +0 −105 tests/modeltests/many_to_one_null/models.py
  2. +84 −0 tests/modeltests/many_to_one_null/tests.py
@@ -22,108 +22,3 @@ class Meta:
def __unicode__(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>]
# We can achieve the same thing by filtering for the case where the reporter is
# None.
>>> Article.objects.filter(reporter=None)
[<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>]
"""}
@@ -0,0 +1,84 @@
from django.test import TestCase
from models import Reporter, Article
class ManyToOneNullTests(TestCase):
def setUp(self):
# Create a Reporter.
self.r = Reporter(name='John Smith')
self.r.save()
# Create an Article.
self.a = Article(headline="First", reporter=self.r)
self.a.save()
# Create an Article via the Reporter object.
self.a2 = self.r.article_set.create(headline="Second")
# Create an Article with no Reporter by passing "reporter=None".
self.a3 = Article(headline="Third", reporter=None)
self.a3.save()
# Create another article and reporter
self.r2 = Reporter(name='Paul Jones')
self.r2.save()
self.a4 = self.r2.article_set.create(headline='Fourth')
def test_get_related(self):
self.assertEqual(self.a.reporter.id, self.r.id)
# Article objects have access to their related Reporter objects.
r = self.a.reporter
self.assertEqual(r.id, self.r.id)
def test_created_via_related_set(self):
self.assertEqual(self.a2.reporter.id, self.r.id)
def test_related_set(self):
# Reporter objects have access to their related Article objects.
self.assertQuerysetEqual(self.r.article_set.all(),
['<Article: First>', '<Article: Second>'])
self.assertQuerysetEqual(self.r.article_set.filter(headline__startswith='Fir'),
['<Article: First>'])
self.assertEqual(self.r.article_set.count(), 2)
def test_created_without_related(self):
self.assertEqual(self.a3.reporter, None)
# Need to reget a3 to refresh the cache
a3 = Article.objects.get(pk=3)
self.assertRaises(AttributeError, getattr, a3.reporter, 'id')
# Accessing an article's 'reporter' attribute returns None
# if the reporter is set to None.
self.assertEqual(a3.reporter, None)
# To retrieve the articles with no reporters set, use "reporter__isnull=True".
self.assertQuerysetEqual(Article.objects.filter(reporter__isnull=True),
['<Article: Third>'])
# We can achieve the same thing by filtering for the case where the
# reporter is None.
self.assertQuerysetEqual(Article.objects.filter(reporter=None),
['<Article: Third>'])
# Set the reporter for the Third article
self.assertQuerysetEqual(self.r.article_set.all(),
['<Article: First>', '<Article: Second>'])
self.r.article_set.add(a3)
self.assertQuerysetEqual(self.r.article_set.all(),
['<Article: First>', '<Article: Second>', '<Article: Third>'])
# Remove an article from the set, and check that it was removed.
self.r.article_set.remove(a3)
self.assertQuerysetEqual(self.r.article_set.all(),
['<Article: First>', '<Article: Second>'])
self.assertQuerysetEqual(Article.objects.filter(reporter__isnull=True),
['<Article: Third>'])
def test_remove_from_wrong_set(self):
self.assertQuerysetEqual(self.r2.article_set.all(), ['<Article: Fourth>'])
# Try to remove a4 from a set it does not belong to
self.assertRaises(Reporter.DoesNotExist, self.r.article_set.remove, self.a4)
self.assertQuerysetEqual(self.r2.article_set.all(), ['<Article: Fourth>'])
def test_assign_clear_related_set(self):
# Use descriptor assignment to allocate ForeignKey. Null is legal, so
# existing members of set that are not in the assignment set are set null
self.r2.article_set = [self.a2, self.a3]
self.assertQuerysetEqual(self.r2.article_set.all(),
['<Article: Second>', '<Article: Third>'])
# Clear the rest of the set
self.r.article_set.clear()
self.assertQuerysetEqual(self.r.article_set.all(), [])
self.assertQuerysetEqual(Article.objects.filter(reporter__isnull=True),
['<Article: First>', '<Article: Fourth>'])

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