module CachingPlugin
  def self.included(base)
    base.send :extend, ClassMethods
  end
  module ClassMethods
    def smart_cache(id, name)
      klass = self.class.to_s # This is evaluating to "Class" where I'm expecting "User"
      obj = Object.const_get(klass).find(id)
      obj.do_caching(name)
    end
  end
  module InstanceMethods
    def do_caching(name)
      # caches self.values
    end
  end
end