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class ActiveRecord::Base
@@cache_store = nil
def self.cache_store
@@cache_store ||= ActionController::Base.cache_store
end
def self.caches(method_name, key = nil, options = {}, &block)
if key.is_a?(Hash)
options = key
key = nil
end
define_method "cached_#{method_name}" do
key = instance_eval(&block) if block
self.class.cache_store.fetch("#{method_name}:#{key}", options) { send(method_name) }
end
end
end
class MyModel < ActiveRecord::Base
caches(:expensive_query, :expires_in => 15.minutes) { "#{id}:#{id.updated_at.to_i}" }
end
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