[Django]-How can explicitly reset a template fragment cache in Django?

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In theory, yes. You first have to create a template cache key in the same pattern used by Django, which can be done with this snippet of code:

from django.utils.hashcompat import md5_constructor
from django.utils.http import urlquote

def template_cache_key(fragment_name, *vary_on):
    """Builds a cache key for a template fragment.

    This is shamelessly stolen from Django core.
    """
    base_cache_key = "template.cache.%s" % fragment_name
    args = md5_constructor(u":".join([urlquote(var) for var in vary_on]))
    return "%s.%s" % (base_cache_key, args.hexdigest())

You could then do something like cache.set(template_cache_key(sidebar), 'new content') to change it.

However, doing that in a view is kind of ugly. It makes more sense to set up post-save signals and expire cache entries when models change.

The above code snippet works for Django 1.2 and below. I’m not sure about Django 1.3+ compatibility; django/templatetags/cache.py will have the latest info.

For Django 1.7, django/core/cache/utils.py has a usable function.

👤mipadi

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