build_named_route_call

# File actionpack/lib/action_controller/polymorphic_routes.rb, line 128
      def build_named_route_call(records, namespace, inflection, options = {})
        unless records.is_a?(Array)
          record = extract_record(records)
          route  = ''
        else
          record = records.pop
          route = records.inject("") do |string, parent|
            string << "#{RecordIdentifier.send!("singular_class_name", parent)}_"
          end
        end

        route << "#{RecordIdentifier.send!("#{inflection}_class_name", record)}_"

        action_prefix(options) + namespace + route + routing_type(options).to_s
      end