Opened 7 years ago

Last modified 5 years ago

#28147 closed Bug

Saving parent object after setting on child leads to unexpected data loss — at Version 1

Reported by: Erwin Junge Owned by: nobody
Component: Database layer (models, ORM) Version: dev
Severity: Normal Keywords:
Cc: Tim Martin, jon.dufresne@… Triage Stage: Ready for checkin
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by Erwin Junge)

When saving a parent object after setting it on a child object and then saving the child object, no error is thrown but the FK relation is saved with a NULL value.

Failing testcase:

        # Create parent and child, save parent, save child, parent_id should be set
        p = Parent()
        c = Child(parent=p)
        p.save()
        c.save()
        c.refresh_from_db()
        self.assertIs(c.parent, p)

Patch available: ​https://github.com/django/django/pull/8434

Change History (1)

comment:1 by Erwin Junge, 7 years ago

Description: modified (diff)
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