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
23687	Prevent `ContentType.objects.get_for_model` from creating objects for deferred, auto_created and swapped models	ILYA	nobody	"This ticket is extracted from #23444 for the sake of clarity. See initial discussion there.

Briefly:

`ContentType.objects.get_for_model` method returns appropriate `ContentType` object for the model if it exsits and creates one if not. But it doesn't check whether a model passed to it is deferred, auto_created or swapped.
Thus we get unnecessary `ContentType` objects in our DB that will be removed after next sync_db/migrate as django by default considers such CT objects as stale (and doesn't create them by itself anyway)."	Cleanup/optimization	new	contrib.contenttypes	dev	Normal				Accepted	0	0	0	0	0	0