instance method new_polymorphic_path

# File actionpack/lib/action_dispatch/routing/polymorphic_routes.rb, line 166
      def new_polymorphic_path(record_or_hash, options = {}) = polymorphic_path_for_action("new", record_or_hash, options)

      private
        def polymorphic_url_for_action(action, record_or_hash, options)
          if options.empty? && !(Hash === record_or_hash) && !polymorphic_mapping(record_or_hash)
            # What polymorphic_url does with action: as the only option.
            HelperMethodBuilder.polymorphic_method(self, record_or_hash, action, :url, options)
          else
            polymorphic_url(record_or_hash, options.merge(action: action))
          end
        end

        def polymorphic_path_for_action(action, record_or_hash, options)
          if options.empty? && !(Hash === record_or_hash) && !polymorphic_mapping(record_or_hash)
            # What polymorphic_path does with action: as the only option.
            HelperMethodBuilder.polymorphic_method(self, record_or_hash, action, :path, options)
          else
            polymorphic_path(record_or_hash, options.merge(action: action))
          end
        end

        def polymorphic_mapping(record)
          if record.respond_to?(:to_model)
            _routes.polymorphic_mappings[record.to_model.model_name.name]
          else
            _routes.polymorphic_mappings[record.class.name]
          end
        end

        class HelperMethodBuilder # :nodoc:
          CACHE = { path: {}, url: {} }.freeze

          def self.get(action, type)
            type = type.to_sym
            CACHE[type].fetch(action) { build action, type }
          end

          def self.url;  CACHE[:url][nil]; end
          def self.path; CACHE[:path][nil]; end

          def self.build(action, type)
            prefix = action ? "#{action}_" : ""
            suffix = type
            if action.to_s == "new"
              HelperMethodBuilder.singular prefix, suffix
            else
              HelperMethodBuilder.plural prefix, suffix
            end
          end

          def self.singular(prefix, suffix)
            new(->(name) { name.singular_route_key }, prefix, suffix)
          end

          def self.plural(prefix, suffix)
            new(->(name) { name.route_key }, prefix, suffix)
          end

          def self.polymorphic_method(recipient, record_or_hash_or_array, action, type, options)
            builder = get action, type

            case record_or_hash_or_array
            when Array
              record_or_hash_or_array = record_or_hash_or_array.compact
              if record_or_hash_or_array.empty?
                raise ArgumentError, "Nil location provided. Can't build URI."
              end
              if record_or_hash_or_array.first.is_a?(ActionDispatch::Routing::RoutesProxy)
                recipient = record_or_hash_or_array.shift
              end

              method, args = builder.handle_list record_or_hash_or_array
            when String, Symbol
              method, args = builder.handle_string record_or_hash_or_array
            when Class
              method, args = builder.handle_class record_or_hash_or_array

            when nil
              raise ArgumentError, "Nil location provided. Can't build URI."
            else
              return builder.dispatch_model(recipient, record_or_hash_or_array, options.empty? ? nil : options)
            end

            if options.empty?
              recipient.public_send(method, *args)
            else
              recipient.public_send(method, *args, options)
            end
          end

          attr_reader :suffix, :prefix

          def initialize(key_strategy, prefix, suffix)
            @key_strategy = key_strategy
            @prefix       = prefix
            @suffix       = suffix
            @method_names_key = :"action_dispatch_polymorphic_#{prefix}#{suffix}_method_names"
          end

          def handle_string(record)
            [get_method_for_string(record), []]
          end

          def handle_string_call(target, str)
            target.public_send get_method_for_string str
          end

          def handle_class(klass)
            [get_method_for_class(klass), []]
          end

          def handle_class_call(target, klass)
            target.public_send get_method_for_class klass
          end

          def handle_model_call(target, record)
            if mapping = polymorphic_mapping(target, record)
              mapping.call(target, [record], suffix == "path")
            else
              dispatch_model(target, record)
            end
          end

          # Calls the named route helper for a model straight away, rather
          # than building an argument list and a pair for the caller to splat
          # apart again.
          def dispatch_model(target, record, options = nil)
            model = record.to_model

            if model.persisted?
              method = get_method_for_string(model.model_name.singular_route_key)
              options ? target.public_send(method, model, options) : target.public_send(method, model)
            else
              method = get_method_for_class(model)
              options ? target.public_send(method, options) : target.public_send(method)
            end
          end

          # Takes ownership of +list+, a copy made by the caller.
          def handle_list(list)
            record = list.pop

            args = []
            named_route = prefix.dup

            list.each do |parent|
              named_route <<
                case parent
                when Symbol
                  parent.name
                when String
                  raise(ArgumentError, "Please use symbols for polymorphic route arguments.")
                when Class
                  args << parent
                  parent.model_name.singular_route_key
                else
                  args << parent.to_model
                  parent.to_model.model_name.singular_route_key
                end
              named_route << "_"
            end

            named_route <<
              case record
              when Symbol
                record.name
              when String
                raise(ArgumentError, "Please use symbols for polymorphic route arguments.")
              when Class
                @key_strategy.call record.model_name
              else
                model = record.to_model
                if model.persisted?
                  args << model
                  model.model_name.singular_route_key
                else
                  @key_strategy.call model.model_name
                end
              end

            named_route << "_" << suffix.to_s
            [named_route, args]
          end

          private
            def polymorphic_mapping(target, record)
              if record.respond_to?(:to_model)
                target._routes.polymorphic_mappings[record.to_model.model_name.name]
              else
                target._routes.polymorphic_mappings[record.class.name]
              end
            end

            def get_method_for_class(klass)
              name = @key_strategy.call klass.model_name
              get_method_for_string name
            end

            def get_method_for_string(str)
              names = method_names
              names[str] || names.compute_if_absent(-str.to_s) { -"#{prefix}#{str}_#{suffix}" }
            end

            # Builders are frozen and shared across Ractors (see the make_shareable
            # call below), so the per-builder memo lives in Ractor-local storage.
            def method_names
              ActiveSupport::Ractors.store_if_absent(@method_names_key) { Concurrent::Map.new }
            end

            [nil, "new", "edit"].each do |action|
              CACHE[:url][action]  = build action, "url"
              CACHE[:path][action] = build action, "path"
            end
            ActiveSupport::Ractors.make_shareable(CACHE)
        end
    end