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我是 Rails 新手，正在尝试创建向上/向下投票按钮（为了清楚起见，现在实现为文本链接）。但是，无论单击哪个链接，它都会调用第一个链接的操作，尽管名称不同。

我已经一遍又一遍地阅读了这里的文档和答案，并且整天都在与它搏斗，但仍然无法理解为什么 rails 看不到差异，非常感谢任何帮助。

路线

Futurebot::Application.routes.draw do
  resources :posts do
    resources :comments
  end

resources :posts do
       member do
         post 'delete'
         post 'upVote'
         post 'downVote'
  end
end


match ':posts/:id/:upVote', :controller => 'posts', :action => 'upVote'
match ':posts/:id/:downVote', :controller => 'posts', :action => 'downVote'

如果我删除资源 :posts 块它找不到路线，但似乎匹配语句应该工作（这就是 url 的样子）

看法

<%= link_to "up: ", :action => 'upVote', :id => post.id %>
<%= link_to "down: ", :action => 'downVote', :id => post.id %>

控制器

  def upVote
    @post = Post.find(params[:id])
    if @post.increment!(:score)
    respond_to do |format|
      format.html { redirect_to posts_url }
      format.json { head :no_content }
      end
    end
  end

    def downVote
    @post = Post.find(params[:id])
    if @post.decrement!(:score)
    respond_to do |format|
      format.html { redirect_to posts_url }
      format.json { head :no_content }
      end
    end
  end

rake routes: with the 2 new routes commented out (so just the block is there)

     up_vote_post POST   /posts/:id/up_vote(.:format)                posts#up_vo
te
   down_vote_post POST   /posts/:id/down_vote(.:format)              posts#down_
vote
                  GET    /posts(.:format)                            posts#index

                  POST   /posts(.:format)                            posts#creat
e
                  GET    /posts/new(.:format)                        posts#new
                  GET    /posts/:id/edit(.:format)                   posts#edit
                  GET    /posts/:id(.:format)                        posts#show
                  PUT    /posts/:id(.:format)                        posts#updat
e
                  DELETE /posts/:id(.:format)                        posts#destr
oy
             root        /    

                                   posts#index

在 routes.rb 中使用两条路线耙路线

      delete_post POST   /posts/:id/delete(.:format)                 posts#delet
e
     up_vote_post POST   /posts/:id/up_vote(.:format)                posts#up_vo
te
   down_vote_post POST   /posts/:id/down_vote(.:format)              posts#down_
vote
                  GET    /posts(.:format)                            posts#index

                  POST   /posts(.:format)                            posts#creat
e
                  GET    /posts/new(.:format)                        posts#new
                  GET    /posts/:id/edit(.:format)                   posts#edit
                  GET    /posts/:id(.:format)                        posts#show
                  PUT    /posts/:id(.:format)                        posts#updat
e
                  DELETE /posts/:id(.:format)                        posts#destr
oy
                         /:post/up_vote/:id(.:format)                post#up_vot
e
                         /:post/down_vote/:id(.:format)              post#down_v
ote
             root        /    

                                   posts#index

添加的路线

match ':post/up_vote/:id' => "post#up_vote"
match ':post/down_vote/:id' => "post#down_vote"

更新

奇怪的是，如果我将路线更改为：

match ':post/:id/up_vote/' => "post#up_vote"
match ':post/:id/down_vote/' => "post#down_vote"

..因为这看起来像链接那么错误是

uninitialized constant PostController

我已经尝试根据另一个问题的解决方案同时使用帖子和帖子

4

1 回答 1

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在我看来，这

resources :posts do
  member do
    post 'delete' 
    post 'up_vote'
    post 'down_vote'
  end
end

应该为您提供类似于此的路线输出

POST /posts/:id/delete(.:format)
     /posts/:id/up_vote(.:format)
     /posts/:id/down_vote(.:format)

他们应该映射到PostsController及其各自的行动delete, up_vote, down_vote。

最后有这两条匹配路线有什么原因吗？在我看来，它们几乎就像通配符，我认为您不需要它们。

真正发生的是任何符合以下条件的东西

something/another/path

将被映射到这些路线，特别是第一个路线，它将在参数中拆分，例如

params[:posts] => something
params[:id]    => another
params[:upVote]=> path

发生这种情况是因为您使用的是允许您指定动态路由的冒号字符。例如像这样

match 'hello/world/:name' => "hello#say"

将被映射到 aHelloController和 action say。在动作内部，您将拥有params[:name]等于名称下的任何内容。

所以hello/world/leo会params[:name]等于leo

有关更多信息，请查看：Rails Routes: Dynamic Segments

注意另外，尽量不要在 Ruby 中对方法名使用驼峰式大小写：D

更新:method => "post"您需要一个link_to才能发送发布请求

于 2013-05-08T20:53:19.443 回答