python - Django 内存缓存 : Compare and Set

Question

结束here at the Django groups Tom Evans explains the method在 Django 中进行比较和设置，如下所示

You can access the memcached client via django though: 
>>> from django.core import cache 
>>> c=cache.get_cache('default') 
>>> help(c._client.cas) 

但不知何故我无法让它工作。

>>> from django.core import cache
>>> c=cache.get_cache('memcache')
>>> help(c._client.cas)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
AttributeError: 'MemcachedCache' object has no attribute '_client'

如果不是上面显示的方法，我如何才能在 Django 中进行比较和设置？

我使用 Django 1.3 版。

Answer 1

看完源码!我在 BaseMemcachedCache 找到这个:

@property
def _cache(self):
    """
    Implements transparent thread-safe access to a memcached client.
    """
    if getattr(self, '_client', None) is None:
        self._client = self._lib.Client(self._servers)

    return self._client

所以，我会说，这会起作用:

c._cache.cas

试试，然后告诉我!

了解更多详情:https://code.djangoproject.com/svn/django/trunk/django/core/cache/backends/memcached.py