Rails - Feb 2009 - How to invalidate the model caching in ruby?

Hello All,

I used rails caching to cache the model as  in model language.rb file

def self.cached_languages
    return Rails.cache.fetch(''languages'') { Language.all }
end


Now I want to add/delete some new language to database. So when the
table "languages" changes it should reflect in view. For that I want
to
invalidate the cache.

please tell me How i do that?

Thanks,

Vikas.
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