ruby-on-rails - 添加问题答案时未定义的变量或方法

Question

我正在尝试添加问题的答案。每个问题都有一个答案。我通过部分在评论页面上显示它们，但我不断收到此错误：

undefined local variable or method `answer'

这是我的 answers_controller.rb 的一部分

class AnswersController < ApplicationController
before_action :set_answer, only: [:show, :edit, :update, :destroy]


def index
  @question = Question.find params[:question_id]
  @question.answers
end


def show
end


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


 def edit
 end


 def create
  @question = Question.find(params[:question_id])
  @answer = @question.answers.create(answer_params)

  respond_to do |format|
   if @answer.save
     format.html { redirect_to @comment, notice: 'Answer was successfully created.' }
     format.json { render action: 'show', status: :created, location: @answer }
   else
     format.html { render action: 'new' }
     format.json { render json: @answer.errors, status: :unprocessable_entity }
    end
  end
end

这是我的 _question.html.erb 部分，其中调用了部分答案：

 <%=div_for(question) do %>
  <div class="questioncontainer">
  <p> 
<%= question.body %>

   <%= render :partial => @question.answers %>    

   <% if current_user == @comment.user %>
   <div class="answercontainer">
    <%= link_to 'Answer', new_question_answer_path(question)%>
 </div>


</div>
</p>

<% end %>
<% end %>

最后，这是我的 _answer.html.erb 部分：

<%=div_for(answer) do %>
   <div class="questioncontainer">
   <p> 
<%= answer.body %>
  </p>
  </div>
  <% end %>     

谢谢您的帮助 ：）

Answer 1

answer作为本地传递，通过locals: {answer: @answer}

Answer 2

利用

<%= render question.answers %>

代替

<%= render :partial => @question.answers %>

更多信息在这里： http: //guides.rubyonrails.org/layouts_and_rendering.html#using-partials