点餐制度与协会
点餐制度与协会
提问于 2016-12-19 09:50:10
我正在用Rails做点餐系统，我为用户、餐馆、餐饮和点菜做了模型，我不知道我应该使用哪些关联将所有这些模型连接在一起。现在我的模特们看起来是这样的：
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，当我使用表单订购一些饭菜并将这个订单保存在数据库中时，我在日志中得到了错误：
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：
params.require(:orders).permit(:restaurant_id, :meal_id, :suggestions)我得到了
unknown attribute 'restaurant_id' for Order.我认为这是不好的联想错误，谁能帮我吗？
* UPDATE *
现在，当我试图保存顺序时，日志中出现了错误：
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：
Validation failed: User must exist对于order.errors.inspect，我只得到：
(0.2ms) rollback transaction
No template found for OrdersController#create, rendering head :no_content
Completed 204 No Content in 97ms (ActiveRecord: 1.8ms)我是使用杂食登记前，用户可以订购一顿饭，这是唯一的方式注册或登记。当我创建使用user:references的订单模型时，您认为这可能是一个原因吗？
回答 1
Stack Overflow用户
回答已采纳
发布于 2016-12-19 11:34:53
您说您有一个登录/登录，所以我假设您的控制器中有一个current_user。
为了保存您的订单，您需要提供user_id，以下是一种方法
def order_params
params.require(:orders).permit(:restaurant, :meal, :suggestions)
.merge(user_id: current_user.id)
end页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/41219796
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