Use ActiveResource with non-Rails REST API

Accommodation.rb

class Accommodation < ActiveResource::Base
  class << self
    def element_path(id, prefix_options = {}, query_options = nil)
      prefix_options, query_options = split_options(prefix_options) if query_options.nil?
      "#{prefix(prefix_options)}#{collection_name}/#{id}#{query_string(query_options)}"
    end

    def collection_path(prefix_options = {}, query_options = nil)
      prefix_options, query_options = split_options(prefix_options) if query_options.nil?
      "#{prefix(prefix_options)}#{collection_name}#{query_string(query_options)}"
    end

    def instantiate_collection(collection, prefix_options = {})
      super collection['accommodations'], prefix_options
    end
  end

  self.site = "http://api.accommmodations.com/"

  def persisted?
    false
  end
end

accommodations.json

{
totalNumberOfResults: 818,
accommodations: [
{
id: "bulgarije-burgas-sunny_beach-best_hotel_ever",
name: "Best Hotel Ever",
city: {
code: "sunny_beach",
name: "Sunny Beach"
},
region: {
code: "burgas",
name: "Burgas"
},
country: {
code: "bulgarije",
name: "Bulgarije"
}
},
{
id: "bulgarije-burgas-sunny_beach-hotel_awesome",
name: "Hotel Awesome",
city: {
code: "sunny_beach",
name: "Sunny Beach"
},
region: {
code: "burgas",
name: "Burgas"
},
country: {
code: "bulgarije",
name: "Bulgarije"
}
]
}