NameError未定義的局部變量或方法

Question

如果問題出現在消息視圖中，則需要包括Answers窗體的幫助。我得到一條NameError: undefined local variable or method `question'在線= form_for(:question, :url => question_answers_path(question)) do |f|。

如果它有助於消息來自對話控制器。

/messages/_form.html.slim：

| if question = @message.question.present? 
= form_for(:question, :url => question_answers_path(question)) do |f| 
    ul 
    li= f.text_area :answer, placeholder=('Please add your response...') 
    li= f.text_field :recipient_id, placeholder=('Please add your name...') 
    li= f.submit "Respond" 

    | else 
    = form_for :message, url: [:reply, conversation] do |f| 
     = f.text_area :body, rows: 4, style: 'width: 95%' 
     br 
     = f.submit "Send Message", class: 'btn btn-primary' 
     = submit_tag 'Clear Reply Box', type: :reset, class: 'btn btn-danger' 

答案控制器：

def new 
    @question = Question.find(params[:question_id]) 
    end 

    def show 
    @question = Question.find(params[:question_id]) 
    @answer = Answer.find(params[:id]) 
    end 

    def create 
    @question = Question.find(params[:question_id]) 
    if @question.update_attributes(params[:question]) 
     redirect_to questions_path 
    else 
     render :new 
    end 
    end 
end 

問題控制器：

def show 
     @question = Question.find(params[:id]) 
     @questions = Question.order("created_at DESC") 
     respond_with(@questions) 
    end 

    def create 
     @question = Question.new(params[:question]) 
     if @question.save 
     @message = current_user.send_message(@question.recipient, @question.question, "You have a question from #{@question.sender_id}") 
     redirect_to :back, notice: 'Your question was saved successfully. Thanks!' 
     else 
     render :new, alert: 'Sorry. There was a problem saving your question.' 
     end 
    end 
    end 

原始形式的代碼工作就是裏面的「答案「文件夾（我試圖讓下面的代碼在」messages「文件夾中工作）：

<%= form_for(:question, :url => question_answers_path(@message.question)) do |f| %> 
    <ul> 
     <li><%= f.text_area :answer, {:placeholder => 'Please add your response...'}%></li> 
     <li><%= f.text_field :recipient_id, {:placeholder => 'Please add your name...'} %></li> 
     <li><%= f.submit "Respond" %></li> 
     </ul> 
     <% end %> 

路線：

resources :questions do 
    resources :answers, only: [:new, :create] 
    end 

Answer 1

你應該嘗試更新的代碼，如：

- question = @message.question # will avoid making multiple calls to db for same record 
| if question.present? 
= form_for(:question, :url => question_answers_path(question)) do |f| 

Answer 2

的問題是要傳遞question到路徑幫手，但它是不確定的。您應該使用@message.question：

question_answers_path(@message.question)