osem-fcy/app/controllers/api/v1/rooms_controller.rb

module Api
  module V1
    class RoomsController < Api::BaseController
      load_resource :conference, find_by: :short_title
      respond_to :json

      # Disable forgery protection for any json requests. This is required for jsonp support
      skip_before_action :verify_authenticity_token

      def index
        if @conference
          respond_with @conference.venue ? @conference.venue.rooms : Room.none, callback: params[:callback]
        else
          respond_with Room.all, callback: params[:callback]
        end
      end
    end
  end
end