Per-site vary cache on language

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
from django.middleware.cache import CacheMiddleware

class VaryOnLangCacheMiddleware(CacheMiddleware):

    def __init__(self, **kwargs):
        CacheMiddleware.__init__(self, **kwargs)
        self.ori_key_prefix = self.key_prefix

    def process_request(self, request):
        # Reset key_prefix depending on language
        lang_suffix = '_%s' % request.LANGUAGE_CODE
        if not self.key_prefix.endswith(lang_suffix):
            self.key_prefix = self.ori_key_prefix + lang_suffix
        return CacheMiddleware.process_request(self, request)

Comments

jdunck (on October 22, 2007):

This snippet should not be necessary.

If your view's output depends on the language, just make sure that your HttpResponse has a Vary header that indicates Accept-Language.

(This is still an issue if you use the low-level cache, but not the middleware or decorators.)

Note that if you're using the LocaleMiddleware, you should put this before the CacheMiddleware in your MIDDLEWARE_CLASSES. Order of middleware is important.

If this snippet is, in fact, needed for some reason, it's likely a bug in Django. Rather than using this snippet, please report the details of the bug.

#

(Forgotten your password?)

You may use Markdown syntax here, but raw HTML will be removed.