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I have two apps connecting to memcached servers on different namespaces, for example's sake we'll call them "admin" and "users".

Every now and then I want to expire some fragments in the "users" namespace from the admin application.

Note: I am not caching/expiring actions as per the other several questions/answers I found here. I want to expire keys such as "abcde". I cache all sorts of things, AR results, JSON, and so on.

Already tried things like:

Rails.cache.delete("abcd")
Rails.cache.delete("users/abcd")
Rails.cache.delete("/users/abcd")

Digests are off.

How do I do this?

Nick M
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1 Answers1

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If your rails cache is configured with a namespace, that namespace will be prepended to the cache key automatically. So, when you Rails.cache.write("FOO", "BAR") the key will actually be $NAMESPACE:FOO. Keys are just strings and can't be navigated like a file system or anything fancy (AFAIK).

I think your best option is instantiate a separate instance of a dalli client for your alternative namespace to delete the key.

Daniel Westendorf
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