申請Spree裝飾

Question

H傢伙，首先讓我告訴你我是瘋狂的新手，所以我的問題可能聽起來很愚蠢。我想自定義home_controller.rb中的「index」方法，我知道正確的方法是使用裝飾器。所以我創建了這個文件app/controller/home_controller_decorator.rb。我在那裏有

＃應用程序/控制器/ home_controller_decorator.rb

HomeController.class_eval do 
    def index 
    # Empty method 
    end 
end 

原來大禮包指數方法看起來像

def index 
    @searcher = Spree::Config.searcher_class.new(params) 
    @products = @searcher.retrieve_products 
    respond_with(@products) 
end 

我希望，當我重新啓動與_decorator服務器添加它將在主頁上顯示我沒有產品，否則會崩潰。當應用這個裝飾和啓動服務器我得到這個消息

agop@linux-as2q:~/Desktop/spp> rails server -p 3000 
/home/agop/Desktop/spp/app/controllers/home_controller_decorator.rb:1:in `<top (required)>': uninitialized constant Spree::BaseController (NameError) 
    from /home/agop/Desktop/spp/lib/spree_site.rb:5:in `block in <class:Engine>' 
    from /home/agop/Desktop/spp/lib/spree_site.rb:4:in `glob' 
    from /home/agop/Desktop/spp/lib/spree_site.rb:4:in `<class:Engine>' 
    from /home/agop/Desktop/spp/lib/spree_site.rb:2:in `<module:SpreeSite>' 
    from /home/agop/Desktop/spp/lib/spree_site.rb:1:in `<top (required)>' 
    from /home/agop/Desktop/spp/config/application.rb:11:in `<class:Application>' 
    from /home/agop/Desktop/spp/config/application.rb:10:in `<module:Spp>' 
    from /home/agop/Desktop/spp/config/application.rb:9:in `<top (required)>' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.9/lib/rails/commands.rb:28:in `require' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.9/lib/rails/commands.rb:28:in `block in <top (required)>' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.9/lib/rails/commands.rb:27:in `tap' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.0.9/lib/rails/commands.rb:27:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

我可能不是在熱潮預計的方式寫的裝飾。在home_controller.rb索引方法上應用這個裝飾器的正確方法是什麼？

Answer 1

這是因爲HomeController繼承自Spree::BaseController，由於某些未知原因，此時尚未加載此文件。您應該可以通過將require 'spree/base_controller'置於裝飾器的頂部來修復它。

你能否也請在http://github.com/spree/spree上提交一個GitHub的問題？對於遇到這個問題的其他人也會有所幫助。

Answer 2

ActiveSupport::Concern是一種乾淨的方式來裝飾現有的類。

但是請注意，緩存不會以開發模式緩存，所以您需要在config/environments/development.rb中添加類似以下代碼的內容，以確保您的裝飾方法持續存在。

config.to_prepare do 
     #SomeModel.send(:include, SomeDecorator) 
    end 

Here是這方面的更多細節。