Actionmailer中的电子邮件NoMethodError
我是购买确认的NoMethodError。 不知道我在这里缺少什么。
NoMethodError在/购买未定义的方法`email’为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 [: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 任何建议？
编辑并删除@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 2 3 , 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 [: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176ms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' (gem) actionpack-3.2.8/lib/action_view/template.rb:145:in `block in render' (gem) activesupport-3.2.8/lib/active_support/notifications.rb:125:in `instrument' (gem) actionpack-3.2.8/lib/action_view/template.rb:143:in `render' (gem) actionpack-3.2.8/lib/action_view/renderer/template_renderer.rb:47:in `block (2 levels) in render_template' (gem) actionpack-3.2.8/lib/action_view/renderer/abstract_renderer.rb:38:in `block in instrument' (gem) activesupport-3.2.8/lib/active_support/notifications.rb:123:in `block in instrument' (gem) activesupport-3.2.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument' (gem) activesupport-3.2.8/lib/active_support/notifications.rb:123:in `instrument' (gem) actionpack-3.2.8/lib/action_view/renderer/abstract_renderer.rb:38:in 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`process_action' (gem) actionpack-3.2.8/lib/action_controller/metal/rendering.rb:10:in `process_action' (gem) actionpack-3.2.8/lib/abstract_controller/callbacks.rb:18:in `block in process_action' (gem) activesupport-3.2.8/lib/active_support/callbacks.rb:414:in `_run__3758076575822448262__process_action__1783438763289863484__callbacks' (gem) activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback' (gem) activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks' (gem) activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks' (gem) actionpack-3.2.8/lib/abstract_controller/callbacks.rb:17:in `process_action' (gem) actionpack-3.2.8/lib/action_controller/metal/rescue.rb:29:in `process_action' (gem) actionpack-3.2.8/lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' (gem) activesupport-3.2.8/lib/active_support/notifications.rb:123:in `block in instrument' (gem) 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您需要先分配instance variable然后才能在视图中使用它们。 在你的情况下它的purchase变量。 因此，使邮件程序方法看起来像这样
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!
另一个选择是使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