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Fixed #25296 -- Prevented model related object cache pollution when create() fails due to an unsaved object.

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This commit is contained in:
Raphael Merx
2015-09-16 19:49:40 -07:00
committed by Tim Graham
parent c21410aeeb
commit f5a33e4840
2 changed files with 8 additions and 0 deletions
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3
django/db/models/base.py
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@@ -643,6 +643,9 @@ class Model(six.with_metaclass(ModelBase)):
# constraints aren't supported by the database, there's the
# unavoidable risk of data corruption.
if obj and obj.pk is None:
# Remove the object from a related instance cache.
if not field.remote_field.multiple:
delattr(obj, field.remote_field.get_cache_name())
raise ValueError(
"save() prohibited to prevent data loss due to "
"unsaved related object '%s'." % field.name