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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。

我能够成功地进行 CRUD 类别。我只能列出帖子，但无法显示或更新。

这是我的示例代码：

配置/路由.rb：

resources :categories do
  resources :posts
end

resources :posts do
  resources :comments
end

resources :comments

模型/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.
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1 回答 1

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尝试将您的路线更新为

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

那么您应该能够将它们作为嵌套资源访问。不知道< Connector要去哪里，是Connector基于 ActiveModel 的模型吗？

<subjective> 此外，如果您嵌套了多个级别，您应该重新审视您的应用程序设计，因为这很快就会让人头疼，请参阅：http ://weblog.jamisbuck.org/2007/2/5/nesting-资源 （此代码是 rails 2.x 风格，但设计问题仍然存在） </subjective

于 2011-05-24T03:33:34.073 回答