44 lines
2.0 KiB
Python
44 lines
2.0 KiB
Python
from django.test import TestCase
|
|
|
|
from .models import Article, Author, Comment, Forum, Post, SystemInfo
|
|
|
|
|
|
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.assertEqual(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 afterward. So we extract the ordered list
|
|
# and check the length. Before the fix, this list was too short (some values
|
|
# were omitted).
|
|
self.assertEqual(len(list(Comment.objects.all())), 4)
|