需要幫助發送電子郵件通知在欄杆

Question

嘿傢伙我想發送一個電子郵件在rails當我點擊訂單按鈕到用戶的電子郵件ID，但我得到這個錯誤，當我點擊按鈕undefined method 'items' for #<Order:0x6d83c48> 這我的order_mailer.rb在郵件文件夾

class OrderMailer < ActionMailer::Base 
    default from: "gokuverma94@gmail.com" 


    def order_confirmation order 
     @order=order 
     mail to: order.user.email, subject: "Your order (##{order.id})" 
    end 
end 

，這是我orders_controller.rb

class OrdersController < ApplicationController 

    def create 
     @order_form=OrderForm.new(user: User.new(order_params[:user]),cart: @cart) 
     if @order_form.save 
      notify_user 
      redirect_to root_path,notice:"Thank You for placing the order sir." 
     else 
     render "carts/checkout" 
     end 
    end 

    private 

    def notify_user 
     OrderMailer.order_confirmation(@order_form.order).deliver 
    end 

    def order_params 
     params.require(:order_form).permit(
      user:[:name,:phone,:address,:city,:country,:postal_code,:email]) 
    end 
end 

，最後我的意見/ order_mailer文件夾order_confirmation.text.erb

<h2>Hello</h2><%=@order.user.name%>, 
Thank you for placing an order. Here is a summary for order #<%=@order.id%>: 
<% @order.items.each do |item|%> 
*<%=item.quantity%><%=item.product.name%>($<%=item.total_price%>) 
<%end%> 
Total: $<%=@order.total_price%> 

@ order.user.name工作正常，但是， 我不知道爲什麼它不能找到，爲了能有人告訴我什麼是錯的物品的方法，因爲我只是不能似乎弄明白

cart.rb

class Cart 
attr_reader :items 

    def self.build_from_hash (hash) 
     items= if hash["cart"] then 
      hash["cart"]["items"].map do |item_data| 
      CartItem.new item_data["product_id"],item_data["quantity"] 
      end 
      else 
      [] 
     end 
     new items 
    end 

    def initialize items=[] 
     @items=items 
    end 

    def add_item (product_id) 
     item=@items.find { |item| item.product_id == product_id} 
     if item 
      item.increment 
     else 
     @items << CartItem.new(product_id) 
    end 
    end 

    def empty? 
     @items.empty? 
    end 

    def count 
     @items.length 
    end 

    def grand_total 
     @items.inject(0){|sum,item| sum+item.total_price} 
    end 

    def serialize 
     items = @items.map do |item| 
      { 
       "product_id" =>item.product_id, 
       "quantity" => item.quantity 
     } 
     end 
     { 
       "items" => items 
     } 
    end 
end 

order_item.rb

class OrderItem < ApplicationRecord 
    belongs_to :order 
    belongs_to :product 

    def total_price 
     self.product.price*self.quantity 
    end 
end 

cart_item.rb

class CartItem 
    attr_reader :product_id,:quantity 
    def initialize (product_id,quantity=1) 
     @product_id=product_id 
     @quantity=quantity 
    end 
    def increment 
     @quantity=@quantity+1 
    end 
    def product 
     Product.find product_id 
    end 
    def total_price 
     product.price*quantity 
    end 
end 

Answer 1

從模型數據的順序沒有項目，就不能使用@order.items
更換<% @order.items.each do |item|%>與<% @order.order_items.each do |item|%>