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
12004	Registering abstract model with admin gives confusing / misleading error	Matt Smalley <matt.smalley@…>	nobody	"It makes perfect sense that an abstract model cannot be registered with admin. However, the abstract model is listed with the rest and there is no error until the page for that model is requested from the admin interface. Doing so gives:

{{{
'str' object has no attribute '_default_manager'
}}}

This is a bit mysterious, and IMO would be better handled at the time of registering the model with something more explicit. Also, since this error occurs in some other hard-to-identify cases (see [http://code.djangoproject.com/ticket/10405 #10405], among others), I spent a lot of time going down blind alleys in search of the source of the problem."		closed	contrib.admin	1.1		fixed			Ready for checkin	1	0	0	0	0	0