Rails object caching helpers for ActiveRecord & ActionController

rails_cash.rb

module Rails
  class << self

    # retrieve keyed item from cache
    # store block results if not in cache
    #
    # usage:
    #   cash('user-first-10') { User.limit(10) }
    def cash(key, options=nil)
      object = cache.read(key)
      unless object
        object = yield
        object = object.to_a if object.is_a?(ActiveRecord::Relation)
        cache.write(key, object, options)
      end
      object
    end

  end
end

class ActiveRecord::Base
  def cash(key, options=nil, &block)
    Rails.cash(key, options, &block)
  end
end

class ActionController::Base
  def cash(key, options=nil, &block)
    Rails.cash(key, options, &block)
  end
end