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Fixed another instance like [12099]. Thanks again, Alex Gaynor. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12100 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Joseph Kocherhans 2010-01-05 04:30:51 +00:00
parent 777da5bc73
commit 1e81e2f532
1 changed files with 1 additions and 3 deletions
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4
django/db/models/base.py
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@ -745,9 +745,7 @@ class Model(object):
if not getattr(self, '_adding', False) and self.pk is not None: if not getattr(self, '_adding', False) and self.pk is not None:
qs = qs.exclude(pk=self.pk) qs = qs.exclude(pk=self.pk)
# This cute trick with extra/values is the most efficient way to if qs.exists():
# tell if a particular query returns any results.
if qs.extra(select={'a': 1}).values('a').order_by():
errors.setdefault(field, []).append( errors.setdefault(field, []).append(
self.date_error_message(lookup_type, field, unique_for) self.date_error_message(lookup_type, field, unique_for)
) )