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
23338	Warn when unique=True is set on ForeignKey	Curtis Maloney	Tim Graham <timograham@…>	"Long ago in the dark times before 1.0, there was a bug in Admin that meant using ForeignKey(unique=True) was preferable to using a OneToOneField.

Somehow, people (on IRC) are still doing this -- even new users-- , and I can't figure out why.

Unless I'm missing something, there is no case where a ForeignKey(unique=True) is preferable to a OneToOneField.

Shouldn't we, then, at least add a check/warn to say this?"	New feature	closed	Core (System checks)	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0