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
28283	_changeform_view sends wrong object after ModelForm validation	ddein	Youngkwang Yang	"I noticed strange behavior when changing the form of the admin. If I try to save the form with an error, some functions (`get_fieldsets`, `get_prepopulated_fields`, `get_readonly_fields`, `get_inline_formsets`, something else) get the wrong object after validation. See here: https://github.com/django/django/blob/master/django/contrib/admin/options.py#L1436-L1437
It seems to me not obvious, that after call `is_valid`, object `obj` will be changed. The quick solution for me was the following:
{{{
form = ModelForm(request.POST, request.FILES, instance=copy.copy(obj))
}}}
But maybe the problem elsewhere. Has anyone encountered a similar one, is this a mistake or normal behavior?"	Bug	assigned	contrib.admin	dev	Normal				Accepted	0	0	0	0	0	0