Question

我在Rails做饭订餐系统，我为用户，餐厅，餐和订单制作了模型，我不知道应该使用哪些关联将所有这些模型连接在一起。现在我的模型看起来像这样：

class User < ApplicationRecord
  has_many :orders
  has_many :restaurants, through: :orders
end

class Order < ApplicationRecord
  belongs_to :user
  belongs_to :restaurant
end

class Meal < ApplicationRecord
  belongs_to :restaurant
end

class Restaurant < ApplicationRecord
  has_many :orders
  has_many :meals
  has_many :users, through: :orders
end

现在，当我使用表格订购餐点并将此订单保存在数据库中时，我在日志中收到错误：

 Parameters: {"utf8"=>"✓", "authenticity_token"=>"+pwoJ/82k/2SiS7z4X4nVHyaKCMMfWCECQe6TufnkpNaW9PEgvlwxlf3skAH2QQupSLIoe81Z/I0CleL/m9cjw==", "orders"=>{"restaurant_id"=>"2", "meal_id"=>"2", "suggestions"=>""}, "commit"=>"Place your order"}
 Unpermitted parameters: restaurant_id, meal_id
    (0.1ms)  begin transaction
    (0.1ms)  rollback transaction
 Redirected to http://localhost:3000/
 Completed 302 Found in 8ms (ActiveRecord: 0.2ms)

我的订单控制器如下所示：

 class OrdersController < ApplicationController

   def new
     @order = Order.new
   end

   def create
     @order = Order.new(order_params)
     if @order.save
       redirect_to root_path
       flash[:success] = "Your order has been added"
     else
       flash[:danger] = "Error"
       redirect_to root_path
     end
   end

   private

   def order_params
     params.require(:orders).permit(:restaurant, :meal, :suggestions)
   end
 end

当我将def order_params更改为：

时

 params.require(:orders).permit(:restaurant_id, :meal_id, :suggestions)

我正在

 unknown attribute 'restaurant_id' for Order.

我认为它的错误关联是错误的，任何人都可以帮助我吗？

*更新*

现在，当我尝试保存订单时，我的日志中出现错误：

 Started POST "/new_order" for 127.0.0.1 at 2016-12-19 11:18:50 +0100
 Processing by OrdersController#create as HTML
   Parameters: {"utf8"=>"✓", "authenticity_token"=>"nnDqY0FVzUslTJ1VoL57vnlO6aSTLcVuenT1GJwloJ8+txGAPJoucOAyAeZGGVjEoPYJJnBlwhhHeRjdha1ugw==", "orders"=>{"restaurant_id"=>"4", "meal_id"=>"26", "suggestions"=>""}, "commit"=>"Place your order"}
    (0.1ms)  begin transaction
   Restaurant Load (0.1ms)  SELECT  "restaurants".* FROM "restaurants" WHERE "restaurants"."id" = ? LIMIT ?  [["id", 4], ["LIMIT", 1]]
    (0.1ms)  rollback transaction
 Redirected to http://localhost:3000/
 Completed 302 Found in 6ms (ActiveRecord: 0.3ms)

*更新2 *

当我更改为@order.save!时，我得到了：

 Validation failed: User must exist

order.errors.inspect我得到：

  (0.2ms)  rollback transaction
 No template found for OrdersController#create, rendering head :no_content
 Completed 204 No Content in 97ms (ActiveRecord: 1.8ms)

我使用omniauth登录之前，用户可以订餐，这只是注册或登录的方式。当我创建订单模型时，我使用user:references，您认为这可能是一个原因？

Answer 1

你说你有一个sign_in / sign_up，所以我假设你的控制器中有一个current_user。

为了保存您的订单，您需要提供user_id，这是一种方法

def order_params
  params.require(:orders).permit(:restaurant, :meal, :suggestions)
    .merge(user_id: current_user.id)
end

膳食订购系统和协会

1 个答案: