Question

我有一个问题模型和一个答案模型。在问题显示视图中，我使用循环显示给定问题的所有答案。我想对这些答案进行投票。我正在使用acts_as_votable gem。

这是我在加载“/ questions / 1”时遇到的错误：

No route matches {:action=>"upvote", :controller=>"answers", :id=>nil, :question_id=>"1"} missing  required keys: [:id]

似乎答案：id未被检测到，因此它没有找到匹配的路线（例如/ questions / 1 / answers / 1 / like）。我在这里做错了什么？

奇怪的是，使用相同的代码，投票在Answers索引视图中完美运行。所以我怀疑这是通过问题控制器和视图尝试使用此代码。这可能是一个明显的问题，但感谢任何提示！

我的嵌套路线：

resources :questions do
  resources :answers do
    member do
      put 'like', to: 'answers#upvote'
      put 'dislike', to: 'answers#downvote'
    end
  end
end

我的答案控制器 - upvote / downvote行动：

def upvote
     @question = Question.find(params[:question_id])
     @answer = @question.answers.find(params[:id])
     @answer.upvote_by current_user
     redirect_to question_answers_path(@question)
 end

 def downvote
    @question = Question.find(params[:question_id])
    @answer = @question.answers.find(params[:id])
    @answer.downvote_by current_user
    redirect_to question_answers_path(@question)
 end

我的问题显示视图（最终我会将其视为部分）

<% @question.answers.each do |answer| %>
  <li class="answer-item">
     <div class="answer-description">
        <%= answer.description %>          
     </div>
     <div class="vote">
        <div class="col-xs-3">
          <%= link_to 'UP', like_question_answer_path(@question, answer), method: :put %>
        </div>
        <div class="col-xs-9">
        </div>
     </div>
   </li>

我的路线：

    like_question_answer PUT    /questions/:question_id/answers/:id/like(.:format)    answers#upvote
dislike_question_answer  PUT    /questions/:question_id/answers/:id/dislike(.:format)  answers#downvote
       question_answers  GET    /questions/:question_id/answers(.:format)             answers#index
                         POST   /questions/:question_id/answers(.:format)             answers#create
    new_question_answer  GET    /questions/:question_id/answers/new(.:format)         answers#new
   edit_question_answer  GET    /questions/:question_id/answers/:id/edit(.:format)    answers#edit
        question_answer  GET    /questions/:question_id/answers/:id(.:format)         answers#show
                         PATCH  /questions/:question_id/answers/:id(.:format)         answers#update
                         PUT    /questions/:question_id/answers/:id(.:format)         answers#update
                         DELETE /questions/:question_id/answers/:id(.:format)         answers#destroy
            questions    GET    /questions(.:format)                                 questions#index
                         POST   /questions(.:format)                                 questions#create
            new_question GET    /questions/new(.:format)                             questions#new
           edit_question GET    /questions/:id/edit(.:format)                        questions#edit
                question GET    /questions/:id(.:format)                             questions#show
                         PATCH  /questions/:id(.:format)                             questions#update
                         PUT    /questions/:id(.:format)                             questions#update
                         DELETE /questions/:id(.:format)                             questions#destroy

Answer 1

No route matches {:action=>"upvote", :controller=>"answers", :id=>nil, :question_id=>"1"} missing  required keys: [:id]

此错误消息告诉您需要知道的一切。当您在答案视图中时，id（答案ID）正在传递给Answers控制器，但是当您在问题视图中时，没有答案ID来填充请求的该参数。因为参数不存在，所以它与路线的正则表达不匹配。

PUT questions/1/answers/1/like

必须包含作为请求一部分的ID。

修改假设您有一个现有的问题和答案记录。如果更改以下行，是否会出错？

<%= link_to 'UP', like_question_answer_path(Question.first, Answer.first), method: :put %>

如何在另一个模型的视图中显示的嵌套资源上使用acts_as_votable？例如。在Q＆amp; A背景下

1 个答案: