On Fri, May 13, 2011 at 3:01 PM, Nan <ringe...@gmail.com> wrote: > I'm working on a site where about 95% of the pages are "static" and > change no more than once a week, and should therefore be cached; > however, there are a couple blocks in the base template (login forms, > blocks that load randomized content, etc) that shouldn't be cached. > Is there any way to enable cache on everything else but disable it on > those blocks? I feel like it's extremely inefficient to have to hit > the database for page data on every view of a static page because of > that. > > I suppose that the static page query results could be cached, but a) > they'd still have to be re-rendered, and b) that would mean updating > every one of about 30 views, and any views built in the future, which > doesn't feel very DRY or maintainable. Am I missing something, or > misunderstanding something fundamental about how Django's cache > framework works?
The term you're looking for is "two-phase rendering": you basically want to render the template once, cache that, and then later render just a bit of it again. Adrian wrote about the technique some time ago; see http://www.holovaty.com/writing/django-two-phased-rendering/. There are some tips there for building something by hand, or you could django-phased, which seems to work out-of-the-box: https://github.com/codysoyland/django-phased. The technique I usually use is to use Varnish's ESI features (http://varnish.projects.linpro.no/wiki/ESIfeatures) and push the caching out to the edge. There's a writeup of a technique similar to mine at http://yml-blog.blogspot.com/2010/01/esi-using-varnish-and-django.html, and again there's an app that appears to provide the Django-y bits: https://bitbucket.org/mlhamel/django-esi/src. Good luck! Jacob -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
