导轨路由错误？

Question

我想以这样的URL来访问我的检查站＃指数法： http://localhost:3000/lessons/introductions/checkpoints/

但我得到这个错误：因为在我的“耙路线”

No route matches {:action=>"show", :controller=>"checkpoints", :lesson_id=>#<Checkpoint id: 1, checkpoint: "Definition of Monetary Policy", url: "http://www.youtube.com/watch?v=HX3wOWN9-sM", objective: "Define monetary policy", description: "Welcome to this series of lectures on monetary poli...", question: "What is the definition of monetary policy?", hint: "It is the deliberate manipulation of something OR s...", answer: "-", lesson_id: 8, created_at: "2012-06-29 07:21:47", updated_at: "2012-06-30 08:24:15", slug: "definition-of-monetary-policy">}

这不应该是这样的：

 lesson_checkpoints GET /lessons/:lesson_id/checkpoints(.:format)   checkpoints#index 
         POST /lessons/:lesson_id/checkpoints(.:format)   checkpoints#create 
    new_lesson_checkpoint GET /lessons/:lesson_id/checkpoints/new(.:format)  checkpoints#new 
    edit_lesson_checkpoint GET /lessons/:lesson_id/checkpoints/:id/edit(.:format) checkpoints#edit 
     lesson_checkpoint GET /lessons/:lesson_id/checkpoints/:id(.:format)  checkpoints#show 
         PUT /lessons/:lesson_id/checkpoints/:id(.:format)  checkpoints#update 
         DELETE /lessons/:lesson_id/checkpoints/:id(.:format)  checkpoints#destroy` 

不是加载#index操作而不是#show操作？有谁知道这个错误的可能原因？

这是我的routes.rb看起来像：

resources :lessons do 
    resources :checkpoints 
end 

resources :lessons 

resources :topics do 
    resources :lessons 
end 

#Devise Routes 
devise_for :users 


resources :subjects do 
    resources :topics 
end 

Answer 1

我发现了问题：我的friendly_id是正确的。错误在我看来。我已经定义了两次资源，所以我可以访问localhost/lessons/blahblah的url。这对我有用。我的视图文件需要编辑（从默认的未嵌套的文件），一旦它被纠正，一切都再次顺利进行。

Answer 2

我想你没有为“介绍”中提到的路线。

resources :lessons do 
    resources :introductions 
end 

resources :introductions do 
    resources :checkpoints 
end 

Answer 3

我看到两个问题：

1. 我认为有一些问题与建立friendly_id您的经验模型。 您的friendly_id设置将检查点的对象作为您课程的友好标识，而不是课程的标题，这是您希望从给定的URL获得的标题。

2. 您的路线声明不正确。你宣布资源“课程”两次。

resources :lessons do 
    resources :checkpoints 
end 
resources :lessons 

您可以检查您friendly_id的正确性控制台：

lesson = Lesson.create(name: 'introduction') 
lesson.friendly_id #=> should output 'introduction'