Ruby on rails Actionmailer中电子邮件的命名错误

我是采购确认书的命名者。不确定我在这里遗漏了什么。
在/购买时的命名错误 nil:NilClass的未定义方法“email”

purchase_confirmationapp/mailers/purchase_mailer.rb

     #   en.purchase_mailer.purchase_confirmation.subject
8   #
9   def purchase_confirmation(purchase)
10     @greeting = "Hi"
11     
12     mail to: purchase.email, subject: "Purchase Confirmation"
13   end
14 end


createapp/controllers/purchases_controller.rb

1 class PurchasesController < InheritedResources::Base
2 before_filter :authenticate_admin_user!, :only => [:index, :edit, :update, :destroy]
3         def create
4                 @purchase = Purchase.new(params[:purchase])
5   if @purchase.save
6           PurchaseMailer.purchase_confirmation(@purchase).deliver
7   redirect_to "/thankyou"
8 else
9 
10   render :action => "new"
11 end

---

在视图中使用这些变量之前，需要分配

实例变量

。在您的情况下，它的

purchase

变量。所以让mailer方法看起来像这样

 def purchase_confirmation(purchase)
    @greeting = "Hi"
    @purchase = purchase
    mail to: purchase.email, subject: "Purchase Confirmation"
  end
end

在视图中，您应该这样做

<%= @purchase.email %>

<%= @greeting %>, thanks for your purchase! We're on it! 

，谢谢您的购买！我们在上面！

另一个选项是使实例变量可供其他类访问：

 class PurchasesController < InheritedResources::Base
 #adding this will allow you to access the instance variable in other classes. 
 attr_accessor :purchase
2 before_filter :authenticate_admin_user!, :only => [:index, :edit, :update, :destroy]
3         def create
4                 @purchase = Purchase.new(params[:purchase])
5   if @purchase.save
6           PurchaseMailer.purchase_confirmation(@purchase).deliver
7   redirect_to "/thankyou"
8 else
9 
10   render :action => "new"
11 end

class PurchasesController[：索引、编辑、更新、销毁]
3定义创建
4@purchase=purchase.new（参数[：purchase]）
5如果@purchase.save
6 PurchaseMailer.purchase\u确认（@purchase）.deliver
7将_重定向到“/谢谢”
8其他
9
10呈现：操作=>“新建”
11完

第12行-删除变量前面的@符号：

邮寄至：purchase.email，主题：“购买确认”

现在我收到一个未定义的nil方法“purchase”：Nilclass@Andrei您能提供完整的错误跟踪吗？@Andrei我在原始帖子的底部添加了完整跟踪您刚刚重新发布了purchase\u mailer和purchases\u controller。在错误跟踪中还有其他什么吗？好的@benchwarmer-非常接近。无错误，且我的终端显示（3.1ms）提交事务已提交购买\u mailer/purchase\u confirmation.text.erb（0.6ms）已将邮件发送至（136ms）日期：2013年2月27日星期三13:02:23-0500发件人：orders@itcinema.com消息ID：主题：购买确认Mime版本：1.0内容类型：文本/普通；charset=UTF-8内容传输编码：7bit Hi，感谢您的购买！我们在上面！已重定向到308ms（ActiveRecord:4.5ms）中找到的已完成302。请签出此答案，并确保在完成所有步骤后重新启动服务器

<%= @purchase.email %>

<%= @greeting %>, thanks for your purchase! We're on it! 

 class PurchasesController < InheritedResources::Base
 #adding this will allow you to access the instance variable in other classes. 
 attr_accessor :purchase
2 before_filter :authenticate_admin_user!, :only => [:index, :edit, :update, :destroy]
3         def create
4                 @purchase = Purchase.new(params[:purchase])
5   if @purchase.save
6           PurchaseMailer.purchase_confirmation(@purchase).deliver
7   redirect_to "/thankyou"
8 else
9 
10   render :action => "new"
11 end