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Fixed a regression in validate_unique introduced in [12098]. Thanks, …

…Alex Gaynor.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12099 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit 777da5bc732348d2182ad0231e89b0cad1a79b5b 1 parent 471596f
Joseph Kocherhans jkocherhans authored
Showing with 1 addition and 3 deletions.
  1. +1 −3 django/db/models/base.py
4 django/db/models/base.py
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@@ -715,9 +715,7 @@ def _perform_unique_checks(self, unique_checks):
if not getattr(self, '_adding', False) and self.pk is not None:
qs = qs.exclude(pk=self.pk)
- # This cute trick with extra/values is the most efficient way to
- # tell if a particular query returns any results.
- if qs.extra(select={'a': 1}).values('a').order_by():
+ if qs.exists():
if len(unique_check) == 1:
key = unique_check[0]
else:
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