此解决方案适用于1.7之前的Django版本
这是我写的一种解决方案，用于执行你在自己的一些项目中正在谈论的事情：
def expire_view_cache(view_name, args=[], namespace=None, key_prefix=None):
"""
This function allows you to invalidate any view-level cache.
view_name: view function you wish to invalidate or it's named url pattern
args: any arguments passed to the view function
namepace: optioal, if an application namespace is needed
key prefix: for the @cache_page decorator for the function (if any)
"""
from django.core.urlresolvers import reverse
from django.http import HttpRequest
from django.utils.cache import get_cache_key
from django.core.cache import cache
# create a fake request object
request = HttpRequest()
# Loookup the request path:
if namespace:
view_name = namespace + ":" + view_name
request.path = reverse(view_name, args=args)
# get cache key, expire if the cached item exists:
key = get_cache_key(request, key_prefix=key_prefix)
if key:
if cache.get(key):
# Delete the cache entry.
#
# Note that there is a possible race condition here, as another
# process / thread may have refreshed the cache between
# the call to cache.get() above, and the cache.set(key, None)
# below. This may lead to unexpected performance problems under
# severe load.
cache.set(key, None, 0)
return True
return False
Django会为视图请求的这些缓存设置密钥，因此该操作是为缓存的视图创建一个伪造的请求对象，并使用该对象来获取缓存密钥，然后使其过期。
要以你正在谈论的方式使用它，请尝试以下操作：
from django.db.models.signals import post_save
from blog.models import Entry
def invalidate_blog_index(sender, **kwargs):
expire_view_cache("blog")
post_save.connect(invalidate_portfolio_index, sender=Entry)
因此，基本上，只要保存了Blog Entry对象，就会调用invalidate_blog_index，并且缓存的视图也会过期。注意：尚未对此进行广泛测试，但到目前为止对我来说还不错。
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