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
3938	[0.91-bugfixes][patch] Admin list page for one-to-one objects breaks after viewing detail page	Tom Tobin <korpios@…>	James Bennett	"On 0.91-bugfixes, the admin list view for a one-to-one related model will break after viewing an object detail page in certain cases.

How to reproduce:

 1. View the detail page for a one-to-one object that does not have its ""parent"" relation set.
 2. View the list page for the object's model; the list will ''only'' show the object viewed from the detail page until the server is restarted.

This happens because in `django.core.meta.__init__`'s `manipulator_init` function, `lookup_kwargs` is set to the value of `opts.one_to_one_field.rel.limit_choices_to` rather than `.copy()`-ing it.  Since the function then alters `lookup_kwargs` — and thus `limit_choices_to` — to add an `__exact` argument for the primary key of the model, all code that subsequently checks `limit_choices_to` will be affected by the `__exact` argument.

A patch to correct the issue is attached.
"		closed	Core (Other)	0.91		fixed			Unreviewed	1	0	0	0	0	0