0

我的购买确认是 NoMethodError。不知道我在这里缺少什么。
NoMethodError at /purchases undefined method `email' for nil:NilClass

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

有什么建议吗？

编辑和删除@符号后，将@purchase 更改为购买我现在收到此错误

    _app_views_purchase_mailer_purchase_confirmation_text_erb

1 <%= @email.purchase %>
2 
3 <%= @greeting %>, thanks for your purchase! We're on it! 

    purchase_confirmationapp/mailers/purchase_mailer.rb

7   #   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

    Rendered purchase_mailer/purchase_confirmation.text.erb (2.1ms)

在 176 毫秒内完成 500 内部服务器错误

>>NoMethodError - undefined method `purchase' for nil:NilClass:
  app/views/purchase_mailer/purchase_confirmation.text.erb:1:in `_app_views_purchase_mailer_purchase_confirmation_text_erb___3663910894988497772_70151297381080'
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4

2 回答 2

1

您需要先分配 ，instance variable然后才能在视图中使用它们。在您的情况下，它的purchase变量。所以让邮件方法看起来像这样

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

在视图中你应该这样做

<%= @purchase.email %>

<%= @greeting %>, thanks for your purchase! We're on it!
于 2013-02-27T17:21:35.537 回答
0

另一种选择是让您的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
于 2013-02-27T17:59:39.947 回答