Ruby on Rails 显示嵌套的 ActiveResources

我有一个连接到REST rails应用程序的应用程序。我有两个资源：category和post;帖子嵌套在类别中。

我能够成功地对 CRUD 类别进行分类。我只能列出帖子，但在显示或更新方面没有成功。

这是我的示例代码：

config/routes.rb：

resources :categories do
  resources :posts
end
resources :posts do
  resources :comments
end
resources :comments

models/post.rb：

class Post < Connector
  self.site += "/categories/:category_id"         
end

控制器/posts_controller.rb：

class PostsController < ApplicationController
  def index
    @category = Category.find(params[:category_id])
    @posts = Post.all(:params => {:category_id => @category.id})
    respond_to do |format|
      format.html
      format.xml  { render :xml => @posts }
    end
  end
  def show
    @category = Category.find(params[:category_id])      
    @post = Post.find(:id, :params => {:category_id => @category.id})
    respond_to do |format|
      format.html
      format.xml  { render :xml => @post }
    end
  end
end

耙子路线：

    category_posts GET    /categories/:category_id/posts(.:format)          {:action=>"index", :controller=>"posts"}
                   POST   /categories/:category_id/posts(.:format)          {:action=>"create", :controller=>"posts"}
 new_category_post GET    /categories/:category_id/posts/new(.:format)      {:action=>"new", :controller=>"posts"}
edit_category_post GET    /categories/:category_id/posts/:id/edit(.:format) {:action=>"edit", :controller=>"posts"}
     category_post GET    /categories/:category_id/posts/:id(.:format)      {:action=>"show", :controller=>"posts"}
                   PUT    /categories/:category_id/posts/:id(.:format)      {:action=>"update", :controller=>"posts"}
                   DELETE /categories/:category_id/posts/:id(.:format)      {:action=>"destroy", :controller=>"posts"}
        categories GET    /categories(.:format)                             {:action=>"index", :controller=>"categories"}
                   POST   /categories(.:format)                             {:action=>"create", :controller=>"categories"}
      new_category GET    /categories/new(.:format)                         {:action=>"new", :controller=>"categories"}
     edit_category GET    /categories/:id/edit(.:format)                    {:action=>"edit", :controller=>"categories"}
          category GET    /categories/:id(.:format)                         {:action=>"show", :controller=>"categories"}
                   PUT    /categories/:id(.:format)                         {:action=>"update", :controller=>"categories"}
                   DELETE /categories/:id(.:format)                         {:action=>"destroy", :controller=>"categories"}
     post_comments GET    /posts/:post_id/comments(.:format)                {:action=>"index", :controller=>"comments"}
                   POST   /posts/:post_id/comments(.:format)                {:action=>"create", :controller=>"comments"}
  new_post_comment GET    /posts/:post_id/comments/new(.:format)            {:action=>"new", :controller=>"comments"}
 edit_post_comment GET    /posts/:post_id/comments/:id/edit(.:format)       {:action=>"edit", :controller=>"comments"}
      post_comment GET    /posts/:post_id/comments/:id(.:format)            {:action=>"show", :controller=>"comments"}
                   PUT    /posts/:post_id/comments/:id(.:format)            {:action=>"update", :controller=>"comments"}
                   DELETE /posts/:post_id/comments/:id(.:format)            {:action=>"destroy", :controller=>"comments"}
             posts GET    /posts(.:format)                                  {:action=>"index", :controller=>"posts"}
                   POST   /posts(.:format)                                  {:action=>"create", :controller=>"posts"}
          new_post GET    /posts/new(.:format)                              {:action=>"new", :controller=>"posts"}
         edit_post GET    /posts/:id/edit(.:format)                         {:action=>"edit", :controller=>"posts"}
              post GET    /posts/:id(.:format)                              {:action=>"show", :controller=>"posts"}
                   PUT    /posts/:id(.:format)                              {:action=>"update", :controller=>"posts"}
                   DELETE /posts/:id(.:format)                              {:action=>"destroy", :controller=>"posts"}

索引工作正常，我可以列出帖子。

如果我在控制台中这样做：

Post.find(3, :params=>{:category_id=>2})

我能够获得所需的响应，但从浏览器中我收到以下错误。

Failed.  Response code = 404.  Response message = Not Found.

尝试将路由更新为

resources :categories do
    resources :posts do
      resources :comments
    end
  end

然后，您应该能够将它们作为嵌套资源进行访问。不确定< Connector的去向，Connector是基于ActiveModel的模型吗？

<subjective>此外，如果你嵌套了多个级别，你真的应该重新审视你的应用程序设计，因为这很快就会成为一个令人头疼的问题，请参阅：http://weblog.jamisbuck.org/2007/2/5/nesting-resources（此代码是rails 2.x风格，但设计问题仍然存在） </subjective

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