Rails Mailer错误:参数数错误(1表示0)

Question

你好，我正在阅读带有Rails第4版书籍的敏捷Web开发，但我在“任务H:发送邮件”中遇到了一个错误

我有邮件order_notifier.rb

class OrderNotifier < ActionMailer::Base
  default :from => "name@email.tld"

  def received
    @order = order
    mail(:to => order.email, :subject => 'Pragmatic Store Order Confirmation')
  end

  def shipped
    @order = order
    mail(:to => order.email, :subject => 'Pragmatic Store Order Shipped')
  end
end

我有类似于received.text.erb和shipped.text.erb的模板 /views/order_notifier/

Dear <%= @order.name %>
Thank you for your recent order from The Pragmatic Store.
You ordered the following items:
<%= render @order.line_items %>
We'll send you a separate e-mail when your order ships.

我在OrdersController上运行它，我不确定是使用current_cart还是@cart，但我想这并不重要

def create
    @order = Order.new(params[:order])
    @order.add_line_items_from_cart(current_cart)
    #@order.add_line_items_from_cart(@cart)

    respond_to do |format|
 if @order.save
    Cart.destroy(session[:cart_id])
    session[:cart_id] = nil
    OrderNotifier.received(@order).deliver

接收方法的error im tels方法比它需要的参数多一个参数(@order)，但书中是这样写的。错误：

ArgumentError in OrdersController#create
wrong number of arguments (1 for 0)

哪里出错了？谢谢。

Answer 1

错误在于，received方法在OrderNotifier中不带参数，但是控制器正在传递参数。您应该修改通知程序以接受一个参数，order。

另外，我不建议阅读带有Rails的敏捷Web开发。