是什麼在軌嵌套路由

Question

有什麼用rake routes

namespace :alpha do 
    resources :posts 
end 

和

resources :alpha do 
    resources :posts 
end 

Answer 1

退房的差異之間的差異資源和命名空間之間的區別。

這個定義與命名空間：

namespace :alpha do 
    resources :posts 
end 

結果如下路線：

  Prefix Verb URI Pattern      Controller#Action 
    alpha_posts GET /alpha/posts(.:format)   alpha/posts#index 
       POST /alpha/posts(.:format)   alpha/posts#create 
new_alpha_post GET /alpha/posts/new(.:format)  alpha/posts#new 
edit_alpha_post GET /alpha/posts/:id/edit(.:format) alpha/posts#edit 
    alpha_post GET /alpha/posts/:id(.:format)  alpha/posts#show 
       PATCH /alpha/posts/:id(.:format)  alpha/posts#update 
       PUT /alpha/posts/:id(.:format)  alpha/posts#update 
       DELETE /alpha/posts/:id(.:format)  alpha/posts#destroy 

正如你所看到的，是從普通resources路由集，唯一不同的是添加/alpha前綴。

現在的兩級resources路線定義：

resources :alpha do 
    resources :posts 
end 

導致：

  Prefix Verb URI Pattern        Controller#Action 
    alpha_posts GET /alpha/:alpha_id/posts(.:format)   posts#index 
       POST /alpha/:alpha_id/posts(.:format)   posts#create 
new_alpha_post GET /alpha/:alpha_id/posts/new(.:format)  posts#new 
edit_alpha_post GET /alpha/:alpha_id/posts/:id/edit(.:format) posts#edit 
    alpha_post GET /alpha/:alpha_id/posts/:id(.:format)  posts#show 
       PATCH /alpha/:alpha_id/posts/:id(.:format)  posts#update 
       PUT /alpha/:alpha_id/posts/:id(.:format)  posts#update 
       DELETE /alpha/:alpha_id/posts/:id(.:format)  posts#destroy 
    alpha_index GET /alpha(.:format)       alpha#index 
       POST /alpha(.:format)       alpha#create 
     new_alpha GET /alpha/new(.:format)      alpha#new 
    edit_alpha GET /alpha/:id/edit(.:format)     alpha#edit 
      alpha GET /alpha/:id(.:format)      alpha#show 
       PATCH /alpha/:id(.:format)      alpha#update 
       PUT /alpha/:id(.:format)      alpha#update 
       DELETE /alpha/:id(.:format)      alpha#destroy 

正如你所看到的，alpha成爲所有8條REST風格的路線頂級資源。反過來，posts成爲第二級資源，只能通過路徑訪問特定的對象。

瞭解更多Rails Routing from the Outside In。

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