ruby-on-rails - 为嵌套资源创建新的 link_to

Question

我正在尝试使用 link_to 辅助函数为特定产品创建新订单。这是我的:

产品型号

class Product < ActiveRecord::Base
  has_many :orders
end

路线.rb

resources :products, :only => [:show, :new, :create, :index, :update, :destroy] do
    resources :orders, :only => [:create]
  end

产品 View /show.html.erb

<%= link_to 'New Order', new_product_orders_path(@product) %>

订单 Controller

class OrdersController < ApplicationController

  def create
    @order = Order.new
  end

end

相关佣金路线:

product_orders POST   /products/:product_id/orders(.:format)                                     orders#create

但是当我这样做时，我得到了未定义的方法“new_product_orders_path”

在 Rails 4 中执行此操作的正确方法是什么？

Answer 1

在你的 route 添加new action here

resources :orders, :only => [:create, :new]

您的 Controller 也缺少new 操作，在您的create 操作中您需要保存您的记录

class OrdersController < ApplicationController

  before_filter :set_product

  def new
    @order = @product.orders.new
  end

  def create
    @order = @product.orders.new(params[:order])
    @order.save
  end

  private

    def set_product
      @product = Product.where("id =?", params[:product_id]).first
    end

end