Ruby on rails 产生重复结果的嵌套表单更新操作

在嵌套窗体的更新操作期间，它似乎创建了新的嵌套记录，而不是更新当前的嵌套记录

这就是我的控制器的外观：

class ApplicationsController < ApplicationController

  before_filter :set_user_and_job


  def new 
   job = params[:job_id]
   @application = Application.build(job)

  end

  def create
    @application = Application.new(application_params)
    @application.save

    redirect_to root_url, :notice => "You have now applied!"
  end


  def edit 
    @application = Application.find(params[:id])

    @answers = []

    @job.questions.each do |question|
      @application.answers.each do |answer|
        @answers << answer if answer.question_id == question.id
      end
    end

  end

  def update
    @application = Application.find(params[:id])
    @application.update_attributes(application_params)
    redirect_to root_url, :notice => "You have updated your application!"

  end


  def destroy
    Application.find(params[:id]).destroy
    flash[:success] = "Application Deleted."
    redirect_to root_url 
  end 

  def show 
    @application = Application.find(params[:id])

    @answers = []

    @job.questions.each do |question|
      @application.answers.each do |answer|
        @answers << answer if answer.question_id == question.id
      end
    end

  end

private

  def set_user_and_job
      @user = current_user
      @job = Job.find(params[:job_id])
  end

  def application_params
       params.require(:application).permit(:job_id, :user_id, answers_attributes:[:question_id, :content]).merge(user_id: current_user.id, job_id: params[:job_id])
  end


end

<% provide(:title, " Edit this application") %>

  <div class="row">
      <div class="span6">
        <h2> Job: <%= @job.job_title  %></h2>
        <p> <%= @job.job_summary %> </p>
      </div>
      <div class="span6">
        <h2> Applicant: <%= @user.name  %></h2>
      </div>

      <div class="span12">
        <h3>Edit your job application below.</h3>
      </div>
  </div>


<%= form_for [@job, @application] do |f| %>
  <%= render 'shared/error_messages', object: f.object %>

     <% @job.questions.each_with_index do |question| %>
         <%= f.fields_for :answers, question do |question_field| %>
              <%= question_field.label :content, question.content %>
              <%= question_field.text_area :content, :value => "" %>
              <%= question_field.hidden_field :question_id,  :value => question.id  %>
         <% end %>
    <% end %>



   <%= f.submit "Submit the application", class: "button" %>
<% end %>

（这也有点奇怪，因为答案的实际id是39。5实际上是问题的id：s）

---

你对此有何看法？非常感谢SO的导师的帮助：）

尝试将

仅更新

添加到调用

接受

的嵌套属性中

accepts_nested_attributes_for :nested_attribute, update_only: true

---

仅更新不适用于多个关系。您需要将嵌套的attribute:id字段添加到强参数：

def application_params
   params.require(:application).permit(:job_id, :user_id, 
     answers_attributes:[:id, :question_id, :content]).merge(user_id: current_user.id,
     job_id: params[:job_id])
end

---

嗨，bw，我添加了它，但它似乎仍在生成重复记录。如果我能提供更多信息来帮助推断，请告诉我。嗨，菲利普，谢谢你的回复。添加：id参数后，我得到一个NoRecordFound错误。这可能是因为Rails不知何故将问题id误认为答案id，或者我不确定发生了什么。错误在上面的帖子里。你对此有什么想法？更新：Philip需要：id是对的。我之所以得到这个名字是因为我的观点。我没有运行jobs.question.each，然后在它下面运行form_for，而是编写form_for，然后通过编写question_field.object.question.content来获取问题。

ActiveRecord::RecordNotFound in ApplicationsController#update
Couldn't find Answer with ID=5 for Application with ID=17

accepts_nested_attributes_for :nested_attribute, update_only: true

def application_params
   params.require(:application).permit(:job_id, :user_id, 
     answers_attributes:[:id, :question_id, :content]).merge(user_id: current_user.id,
     job_id: params[:job_id])
end