Rails 嵌套路由未按预期工作答案

【问题标题】：Rails nested routes not working as expectedRails 嵌套路由未按预期工作
【发布时间】：2019-08-15 10:17:20
【问题描述】：

我的路线中有这样的嵌套资源。这些在我的其他 rails 5 应用程序上完美运行，但在我的 rails 6 应用程序上却不能。我不明白为什么它只识别第一层嵌套的东西。

  resources :blogs do
    member do
      put 'like', to: 'blogs#upvote'
      put 'dislike', to: 'blogs#downvote'
    end
    resources :comments
      member do
        put 'like', to: 'comments#upvote'
        put 'dislike', to: 'comments#downvote'
      end
      resources :notations
  end

这是 rake 路线给我的：

 blogs_user GET      /users/:id/blogs(.:format)                                                               users#blogs
                             like_blog PUT      /blogs/:id/like(.:format)                                                                blogs#upvote
                          dislike_blog PUT      /blogs/:id/dislike(.:format)                                                             blogs#downvote
                         blog_comments GET      /blogs/:blog_id/comments(.:format)                                                       comments#index
                                       POST     /blogs/:blog_id/comments(.:format)                                                       comments#create
                      new_blog_comment GET      /blogs/:blog_id/comments/new(.:format)                                                   comments#new
                     edit_blog_comment GET      /blogs/:blog_id/comments/:id/edit(.:format)                                              comments#edit
                          blog_comment GET      /blogs/:blog_id/comments/:id(.:format)                                                   comments#show
                                       PATCH    /blogs/:blog_id/comments/:id(.:format)                                                   comments#update
                                       PUT      /blogs/:blog_id/comments/:id(.:format)                                                   comments#update
                                       DELETE   /blogs/:blog_id/comments/:id(.:format)                                                   comments#destroy
                                       PUT      /blogs/:id/like(.:format)                                                                comments#upvote
                                       PUT      /blogs/:id/dislike(.:format)                                                             comments#downvote
                             notations GET      /blogs/:id/notations(.:format)                                                           notations#index
                                       POST     /blogs/:id/notations(.:format)                                                           notations#create
                          new_notation GET      /blogs/:id/notations/new(.:format)                                                       notations#new
                         edit_notation GET      /blogs/:id/notations/:id/edit(.:format)                                                  notations#edit
                              notation GET      /blogs/:id/notations/:id(.:format)                                                       notations#show
                                       PATCH    /blogs/:id/notations/:id(.:format)                                                       notations#update
                                       PUT      /blogs/:id/notations/:id(.:format)                                                       notations#update
                                       DELETE   /blogs/:id/notations/:id(.:format)                                                       notations#destroy

例如，在我的其他应用上，它会产生

/blogs/:blog_id/comments/:id/like

【问题讨论】：

标签： ruby-on-rails

【解决方案1】：

我复制了您的路线并在两个应用程序（Rails 5 和 Rails 6）中进行了复制，并且都生成了相同的路线（没有三个嵌套级别）。如果你想要/blogs/:blog_id/comments/:id/like 路由，你必须做一个小改动。

  resources :blogs do
    member do
      put 'like', to: 'blogs#upvote'
      put 'dislike', to: 'blogs#downvote'
    end
    resources :comments do
      member do
        put 'like', to: 'comments#upvote'
        put 'dislike', to: 'comments#downvote'
      end
    end
    resources :notations
  end

【讨论】：

【解决方案2】：

您缺少“do”“end”块语法

resources :blogs do
  member do
    put 'like', to: 'blogs#upvote'
    put 'dislike', to: 'blogs#downvote'
  end
  resources :comments do # here
    member do
      put 'like', to: 'comments#upvote'
      put 'dislike', to: 'comments#downvote'
    end
    resources :notations
  end # and here
end

无论如何，rails 指南不鼓励多于两层的嵌套。

【讨论】：