mirror of
https://github.com/django/django.git
synced 2024-12-23 17:46:27 +00:00
43 lines
2.0 KiB
Python
43 lines
2.0 KiB
Python
from __future__ import unicode_literals
|
|
|
|
from django.test import TestCase
|
|
|
|
from .models import Author, Article, SystemInfo, Forum, Post, Comment
|
|
|
|
|
|
class NullFkOrderingTests(TestCase):
|
|
|
|
def test_ordering_across_null_fk(self):
|
|
"""
|
|
Regression test for #7512
|
|
|
|
ordering across nullable Foreign Keys shouldn't exclude results
|
|
"""
|
|
author_1 = Author.objects.create(name='Tom Jones')
|
|
author_2 = Author.objects.create(name='Bob Smith')
|
|
Article.objects.create(title='No author on this article')
|
|
Article.objects.create(author=author_1, title='This article written by Tom Jones')
|
|
Article.objects.create(author=author_2, title='This article written by Bob Smith')
|
|
|
|
# We can't compare results directly (since different databases sort NULLs to
|
|
# different ends of the ordering), but we can check that all results are
|
|
# returned.
|
|
self.assertTrue(len(list(Article.objects.all())) == 3)
|
|
|
|
s = SystemInfo.objects.create(system_name='System Info')
|
|
f = Forum.objects.create(system_info=s, forum_name='First forum')
|
|
p = Post.objects.create(forum=f, title='First Post')
|
|
Comment.objects.create(post=p, comment_text='My first comment')
|
|
Comment.objects.create(comment_text='My second comment')
|
|
s2 = SystemInfo.objects.create(system_name='More System Info')
|
|
f2 = Forum.objects.create(system_info=s2, forum_name='Second forum')
|
|
p2 = Post.objects.create(forum=f2, title='Second Post')
|
|
Comment.objects.create(comment_text='Another first comment')
|
|
Comment.objects.create(post=p2, comment_text='Another second comment')
|
|
|
|
# We have to test this carefully. Some databases sort NULL values before
|
|
# everything else, some sort them afterwards. So we extract the ordered list
|
|
# and check the length. Before the fix, this list was too short (some values
|
|
# were omitted).
|
|
self.assertTrue(len(list(Comment.objects.all())) == 4)
|