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Fixed #29896 -- Fixed incorrect Model.save() cache relation clearing for foreign keys that use to_field.

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Regression in ee49306176.
This commit is contained in:
Tim Graham
2018-10-28 22:54:02 -04:00
committed by GitHub
parent 5e8a07d69d
commit f77fc56c96
3 changed files with 12 additions and 3 deletions
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6
django/db/models/base.py
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@@ -676,9 +676,9 @@ class Model(metaclass=ModelBase):
"save() prohibited to prevent data loss due to "
"unsaved related object '%s'." % field.name
)
# If the relationship's pk was changed, clear the cached
# relationship.
if obj and obj.pk != getattr(self, field.attname):
# If the relationship's pk/to_field was changed, clear the
# cached relationship.
if obj and getattr(obj, field.target_field.attname) != getattr(self, field.attname):
field.delete_cached_value(self)
using = using or router.db_for_write(self.__class__, instance=self)