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Fixed #12142 -- EmptyQuerySet.update() no longer updates all rows in the database 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12171 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2010-01-10 17:53:19 +00:00
parent 0683a79d0c
commit cf1b6845d4
2 changed files with 8 additions and 0 deletions
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6
django/db/models/query.py
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@ -1089,6 +1089,12 @@ class EmptyQuerySet(QuerySet):
""" """
return self return self
def update(self, **kwargs):
"""
Don't update anything.
"""
return 0
# EmptyQuerySet is always an empty result in where-clauses (and similar # EmptyQuerySet is always an empty result in where-clauses (and similar
# situations). # situations).
value_annotation = False value_annotation = False

2
tests/modeltests/lookup/models.py
View File

@ -295,6 +295,8 @@ DoesNotExist: Article matching query does not exist.
[] []
>>> Article.objects.none().count() >>> Article.objects.none().count()
0 0
>>> Article.objects.none().update(headline="This should not take effect")
0
>>> [article for article in Article.objects.none().iterator()] >>> [article for article in Article.objects.none().iterator()]
[] []