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
733	small addition to i18n.txt with regard to caching	hugo	Adrian Holovaty	"The i18n.txt (reading much smoother than my version!) should point out that the LocaleMiddleware needs to be _after_ the CacheMiddleware (if used), because it modifies the Vary-header. Otherwise the accept-language header wouldn't be used correctly.

And it is a case for #730: the LocaleMiddleware needs in process_request access to the session, so must come _after_ SessionMiddleware. But SessionMiddleware and LocaleMiddleware must come _after_ CacheMiddleware, so that the caching sees the Vary header in process_response (due to the reversed order of middleare). That's exactly the kind of ""order deadlock"" the user can't solve without giving explicit middleware order.

I copied the above text to #730, too."	defect	closed	Core (Other)		normal	fixed			Unreviewed	0	0	0	0	0	0