new

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 963
          def initialize(entities, options = {})
            @name       = entities.to_s
            @path       = (options[:path] || @name).to_s
            @controller = (options[:controller] || @name).to_s
            @as         = options[:as]
            @param      = (options[:param] || :id).to_sym
            @options    = options
          end