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
23822	Serialize model managers in migrations	Markus Holtermann	Markus Holtermann	Right now it's impossible to use e.g. the `UserManager` in a `RunPython` operation, thus `User.objects.create_superuser()` isn't available. We should serialize the model managers into migrations too. I suggest to do it the same way as with callable argument values on fields like `upload_to`: the manager need to stay around as long as there is a migration referencing it.	New feature	closed	Migrations	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0