id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
11541	F() expressions don't allow assignment of Foreign Key values on instances	Russell Keith-Magee	Aman Pandey	"Lines 93-102 of the expressions model test define the following test case:

{{{
# F expressions cannot be used to update attributes which are foreign keys, or
# attributes which involve joins.
>>> test_gmbh.point_of_contact = None
>>> test_gmbh.save()
>>> test_gmbh.point_of_contact is None
True
>>> test_gmbh.point_of_contact = F('ceo')
Traceback (most recent call last):
...
ValueError: Cannot assign ""<django.db.models.expressions.F object at ...>"": ""Company.point_of_contact"" must be a ""Employee"" instance.
}}}

There's no reason this sort of assignment shouldn't be possible - it just requires the appropriate handling on the related field."	Bug	assigned	Database layer (models, ORM)	1.1-beta	Normal			Abhijeet Viswa	Accepted	0	0	0	0	0	0