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Code Issues 32 Releases Wiki Activity

Fixed #17439 -- Prevented spurious queries for missing objects after prefetch_related has run.

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That affects nullable foreign key, nullable one-to-one, and reverse one-to-one relations.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17899 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Aymeric Augustin
2012-04-11 21:11:22 +00:00
parent e2548ec2a9
commit 632b6a1a73
2 changed files with 23 additions and 8 deletions
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8
tests/modeltests/prefetch_related/tests.py
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@@ -68,6 +68,14 @@ class PrefetchRelatedTests(TestCase):
self.assertQuerysetEqual(self.book2.authors.all(), [u"<Author: Charlotte>"])
def test_onetoone_reverse_no_match(self):
# Regression for #17439
with self.assertNumQueries(2):
book = Book.objects.prefetch_related('bookwithyear').all()[0]
with self.assertNumQueries(0):
with self.assertRaises(BookWithYear.DoesNotExist):
book.bookwithyear
def test_survives_clone(self):
with self.assertNumQueries(2):
lists = [list(b.first_time_authors.all())