dealerships_representer.rb

require 'roar/representer/json'
require 'roar/representer/json/hal'
require 'roar/representer/feature/hypermedia'

require 'lib/api/representers/dealership_representer'

module DealershipsRepresenter
  include Roar::Representer::JSON
  include Roar::Representer::JSON::HAL
  include Roar::Representer::Feature::Hypermedia

  link :self do
    ".../ds"
  end

  collection :dealerships, :rel => ".../rels/dealerships", :class => Motor::Dealership, :extend => DealershipRepresenter, :embedded => true

end

definition.rb

    def from
      (options[:from] || options[:as] || options[:rel] || name ).to_s
    end