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
33077	Wrong URL generated by get_admin_url for readonly field in custom Admin Site	Ken Whitesell	Ken Whitesell	"When a model containing a `ForeignKey` field is viewed (or edited) in a custom Admin Site, and that `ForeignKey` field is listed in `readonly_fields`, the url generated for the link is `/admin/...` instead of `/custom-admin/...`.

This appears to be caused by the following line in `django.contrib.admin.helpers` `get_admin_url`:
`url = reverse(url_name, args=[quote(remote_obj.pk)])`

Other parts of the admin use the `current_app` keyword parameter to identify the correct current name of the Admin Site. (See django.contrib.admin.options.ModelAdmin response_add as just one example)

I have been able to correct this specific issue by replacing the above line with:
{{{
url = reverse(
    url_name,
    args=[quote(remote_obj.pk)],
    current_app=self.model_admin.admin_site.name
)
}}}

However, I don't know if there are any side effects and I have not yet run the full suite of tests on this. Mostly looking for feedback whether I'm on the right track."	Bug	closed	contrib.admin	3.2	Release blocker	fixed			Ready for checkin	1	0	0	0	0	0