Use of cache.clear() may be risky in production

[reggiepy]

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The flushall command is a dangerous operation in Redis, as it clears all keys in all databases. I noticed that DjangoBlog uses cache.clear(), which will trigger flushall when Redis is the cache backend. This might not be safe in a production environment, especially if Redis is shared across services or used for other purposes. Could you consider replacing it with a more fine-grained cache deletion strategy?