ruby-on-rails - 销毁路径在 Ruby on Rails 中不起作用

Question

完全难倒这一点，因为我相信它使用了正确的 Restful 设置，但我似乎无法删除我的列表。

我有以下几点:

Controller :

def destroy
    @list = List.find(params[:id])
    @list.destroy
    redirect_to lists_path
end 

#37 def show
#38     @list = List.find(params[:id])
#39 end

索引.html.haml

- @list.each do |list| 
    ...
    = link_to "Delete", list_path(list), method: :delete, data: { confirm: 'Are you certain you want to delete this?' }
    ...

路线:

ListApp::Application.routes.draw do
    devise_for :users
    resources :lists

这给出了正确的 rake 路由输出:

           lists GET    /lists(.:format)               lists#index                                                                                                                                                                     
                 POST   /lists(.:format)               lists#create                                                                                                                                                                    
        new_list GET    /lists/new(.:format)           lists#new                                                                                                                                                                       
       edit_list GET    /lists/:id/edit(.:format)      lists#edit                                                                                                                                                                      
            list GET    /lists/:id(.:format)           lists#show                                                                                                                                                                      
                 PATCH  /lists/:id(.:format)           lists#update                                                                                                                                                                    
                 PUT    /lists/:id(.:format)           lists#update                                                                                                                                                                    
                 DELETE /lists/:id(.:format)           lists#destroy

但是我在生产环境中运行时仍然收到以下错误。

I, [2013-09-10T15:27:40.338022 #453]  INFO -- : Started GET "/lists/2" for 81.159.35.212 at 2013-09-10 15:27:40 +0000                                                                                                                          
I, [2013-09-10T15:27:40.340626 #453]  INFO -- : Processing by ListsController#show as HTML                                                                                                                                                     
I, [2013-09-10T15:27:40.340867 #453]  INFO -- :   Parameters: {"id"=>"2"}                                                                                                                                                                      
I, [2013-09-10T15:27:40.354092 #453]  INFO -- : Completed 500 Internal Server Error in 13ms                                                                                                                                                    
F, [2013-09-10T15:27:40.359807 #453] FATAL -- :                                                                                                                                                                                                
NameError (undefined local variable or method `list' for #<ListsController:0x000000050a7c38>):                                                                                                                                                 
  app/controllers/lists_controller.rb:38:in `show'  

如果有人知道可能导致这种情况的原因，我们将不胜感激:)

Answer 1

更新了答案。

您的 link_to声明看起来不错:

= link_to "Delete", list_path(list), method: :delete, data: { confirm: 'Are you certain you want to delete this?' }

您的布局文件中可能没有包含必要的 javascript:

# app/views/layouts/application.html.haml
%head
  = javascript_include_tag "application"
  = csrf_meta_tag %>

这就是为什么 list_path无法执行 destroy操作并试图执行 show行动。

如果这不起作用，那么问题出在其他地方，阻止了 javascript 的执行。