gistfile1.rb

resources :things, :glob_id => true

glob_resources_id.rb

module ActionDispatch::Routing::Mapper::Resources
  RESOURCE_OPTIONS << :glob_id

  class Resource
    def member_scope
      "#{path}/#{glob_segment_prefix}id"
    end

    def nested_scope
      "#{path}/#{glob_segment_prefix}#{singular}_id"
    end

    private
      def glob_segment_prefix
        @options[:glob_id] ? "*" : ":"
      end
    end
end