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
27638	Rollback data changes made inside templates	vinay karanam	nobody	"Current implementation to prevent data changes within templates relies on the attribute `alters_data = True`.

By default this is set for all `Model`, `QuerySet` and `ModelForm` methods that can alter data.

But if someone overrides these methods, they need to explicitly set this attribute again.
It is common to override `save` method and not set this attribute.

Even a lot of popular third-party packages endup making this mistake.

I propose that we rollback any data changes that are done during template rendering.
Either by savepoint rollback or by setting autocommit to `False` during rendering.
"	Cleanup/optimization	closed	Template system	dev	Normal	wontfix			Someday/Maybe	0	0	0	0	0	0