NoMethodError для электронной почты в Actionmailer

Question

Im a NoMethodError для моего подтверждения покупки. Не уверен, что мне здесь не хватает.
NoMethodError в/покупки неопределенный метод `электронной почты» на ноль: 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 

Любые советы?

После редактирования и удаления символа @, меняя @purchase купить прямо сейчас я получаю эту ошибку

_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) 

Завершена 500 Внутренняя ошибка сервера в 176ms

>>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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Answer 1

Вам нужно назначить instance variable перед вами могут использовать их в представлениях. В вашем случае это переменная purchase. Так что метод почтовик выглядеть следующим образом

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

В представлении вы должны сделать это

<%= @purchase.email %> 

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

Answer 2

Другим вариантом является, чтобы сделать ваш экземпляр переменной доступным для других классов:

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