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Is there a way to cache per-request data in Rails? For a given Rails/mongrel request I have the result of a semi-expensive operation that I'd like to access several times later in that request. Is there a hash where I can store and access such data?
It needs to be fairly global and accessible from views, controllers, and libs, like Rails.cache and I18n are.
I'm ok doing some monkey-patching if that's what it takes.
- Memcached doesn't work because it'll be shared across requests, which I don't want.
- A global variable similarly doesn't work because different requests would share the same data, which isn't what I want.
- Instance variables don't work because I want to access the data from inside different classes.