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
16905	Custom fields and apps should have a way to hook into BaseCommand.validate	Jeremy Dunck	nobody	"Right now, management.validation.get_validation_errors has a long chain of elif isinstance's for built-in fields.

It should be possible for custom fields to participate in this model-declaration validation phase.

"	New feature	closed	Core (Management commands)	dev	Normal	fixed			Accepted	0	0	0	0	0	0