recursively walk association.accessor chain and return the result

gistfile1.rb

    def render(object)
      receiver = object
      accessors = accessor.split(".")
      while accessor = accessors.shift
        if receiver.class.reflect_on_association(accessor.to_sym)
          receiver = receiver.send(accessor)
        else
          return receiver.send(accessor)
        end
      end
    end