从Django缓存中删除所有匹配的键 [英] Remove all matching keys from Django cache

问题描述

我需要遍历服务器的缓存，该缓存是一个 LocMemCache 对象，并删除缓存中以字符串'rl:'开头的每个键.据我了解，django缓存API提供的唯一功能是获取，设置和删除.这是我正在尝试做的一个粗略示例:

I need to iterate through my server's cache, which is a LocMemCache object, and remove every key in the cache that begins with the string 'rl:'. From what I understand, the only functions that the caching API django provides are get, set, and delete. Here is a rough example of what I am trying to do:

def clear_ratelimit_cache():
    if any('rl:' in s for s in cache.get(s)): 
        log.info(
            'FOUND SOMETHING') 
        cache.delete(*something else here*)

但是，尝试执行此操作给了我一个 NameError ，指出未定义全局名称s'.还必须注意，缓存不可迭代.有没有人以类似的方式使用缓存并提出建议?

Trying to do this, however, gives me a NameError, stating that global name 's' is not defined. Also it must be noted that the cache is not iterable. Has anyone worked with the cache in a similar manner, and has a suggestion?

推荐答案

一种选择是使用在您的配置中单独为此数据类型命名的缓存，然后调用其 clear()方法.

One option would be to have a separate, named cache in your configuration just for this data type, and then call its clear() method.

否则，Django LocMemCache 将项目存储在实例的 _cache 属性中的简单 dict 中.由于他们没有为此提供API，因此您可以直接直接删除以下项目:

Otherwise, Django LocMemCache stores items in a simple dict, in the instance's _cache attribute. Since they don't give you an API for this, you can simply remove the items directly:

for key in cache._cache.keys():
    if key.startswith('rl:'):
        del cache._cache[key]

通常免责声明，这是一个实现细节，不适用于其他缓存类型.

Usual disclaimer, this is an implementation detail that won't work with other cache types.

这篇关于从Django缓存中删除所有匹配的键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！