handle_model

# File actionpack/lib/action_dispatch/routing/polymorphic_routes.rb, line 246
        def handle_model(record)
          args  = []

          model = record.to_model
          named_route = if model.persisted?
                          args << model
                          get_method_for_string model.model_name.singular_route_key
                        else
                          get_method_for_class model
                        end

          [named_route, args]
        end