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
27296	Can't use custom formats with new language-independent LogEntry's messages in Django 1.10	Ivan Tsouvarev	nobody	"Say, you have some model, which `__str__` uses `django.utils.formats.date_format` with custom format string. 

`settings.FORMAT_MODULE_PATH` contains module, in which this string is defined.

So, when you create object of this model via admin interface, the following things happen:
1. Django calls `construct_change_message` to create LogEntry, which is decorated with `@translation_override(None)`, which will deactivate current language
2. To write object representation with custom format in change message, `django.utils.formats.get_format` will be called
3. `get_format` will try to find custom format, but it can't be done when active language is None, so original string will be returned as-is
4. `django.utils.dateformat.format` will interpret custom format string literally, which may not fail with exception, but will be totally wrong anyway"	New feature	closed	contrib.admin	1.10	Normal	needsinfo			Unreviewed	0	0	0	0	0	0