Django get_cache_key works with database backend but not with filesystem

Asked Oct 10 '13 at 11:33

Active Apr 04 '14 at 18:50

Viewed 426 times

I'm facing a curious behaviour when trying to use Django filesystem caching backend.

When trying to find a per view cache key, I do something like this:

request = HttpRequest()
request.path = obj.get_absolute_url()
key = get_cache_key(request)

With database cache backend, it works like a charm:

print key
views.decorators.cache.cache_page..GET.5d9b625d8c44da04c0fc562ad039e0f1.d41d8cd98f00b204e9800998ecf8427e.fr-fr

With filestem cache backend:

print key
None

I checked filesystem cache, and I'm sure the entry actually exists.

Somebody knows how to get it working as well as database caching?

edited Apr 04 '14 at 18:50

tshepang

asked Oct 10 '13 at 11:33

user650108

what does your settings.py contain? does your file cache work at all? – alexvassel Oct 10 '13 at 11:42
Hello alex, settings.py contains this cache setting, and it does actually stores cache files on the filesystem: 'default': { 'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache', 'LOCATION': '/path-to-my-cache', 'TIMEOUT': 604800 } – user650108 Oct 10 '13 at 11:43
How do you use cache? The per-view cache? – alexvassel Oct 10 '13 at 11:45
Yes I do per-view-cache! – user650108 Oct 10 '13 at 11:48
Does django cache your view? – alexvassel Oct 10 '13 at 11:49
Yes, the view is properly cached and delivered by Django. My concern is about expiring the cache for a specific view: I try to get the right cache key and then delete the entry. But with filesystem backend, I can't get the key, which works fine with database caching :( – user650108 Oct 10 '13 at 11:51
Do you use your code inside view function? – alexvassel Oct 10 '13 at 12:05
In fact I use it in the save_model method in admin ModelForm. – user650108 Oct 10 '13 at 12:12
Does view call `save_model`? – alexvassel Oct 10 '13 at 12:16
Via the request parameter provided by Django: save_model(self, request, obj, form, change) – user650108 Oct 10 '13 at 12:17
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/38970/discussion-between-alexvassel-and-user650108) – alexvassel Oct 10 '13 at 12:20

0 Answers0