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[1.0.X] Added a test from Jamie Gennis to ensure #9848 doesn't reappear.

The bug itself was fixed at some point in the past months (there have
been a few improvements to update() recently). Fixed #9848. 

(Merge of r10528 from trunk.  Per comment in #9848 the fix was in r9967,
which was backported in r9968, thus it seems right to backport the new
test as well.)

git-svn-id: bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit a486c1e9b60f145f6ef867ea64a3c8beb750f5cf 1 parent 40a7b54
@kmtracey kmtracey authored
Showing with 17 additions and 0 deletions.
  1. +17 −0 tests/regressiontests/queries/
17 tests/regressiontests/queries/
@@ -1096,6 +1096,23 @@ def __unicode__(self):
>>> list(Note.objects.filter(pk__in=g())) == [n_obj]
+Make sure that updates which only filter on sub-tables don't inadvertently
+update the wrong records (bug #9848).
+# Make sure that the IDs from different tables don't happen to match.
+>>> Ranking.objects.filter(author__name='a1')
+[<Ranking: 3: a1>]
+>>> Ranking.objects.filter(author__name='a1').update(rank='4')
+>>> r = Ranking.objects.filter(author__name='a1')[0]
+>>> !=
+>>> r.rank
+>>> r.rank = 3
+>>> Ranking.objects.all()
+[<Ranking: 3: a1>, <Ranking: 2: a2>, <Ranking: 1: a3>]
# In Python 2.3 and the Python 2.6 beta releases, exceptions raised in __len__
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