Question

首先，我有一个名为Answers的模型用于我的琐事游戏。它存储了每个琐事问题的多个可能答案（测验has_many答案）。我通过脚手架创建了一个表单，以便通过一组四个答案提交一个简单的UI来提交问题。

我想从一种形式做到这一点。当用户当前点击提交时，我可以发布所有四个答案 - 每个答案都有不同的answer_id但共享相同的question_id（因此我可以将4个答案与一个问题相关联） - 成功，就像这样：

 <%= form_for(@question) do |f| %>
   <% if @question.errors.any? %>
   <div id="error_explanation">
       <h2><%= pluralize(@question.errors.count, "error") %> prohibited this question from being saved:</h2>

     <ul>
        <% @question.errors.full_messages.each do |msg| %>
           <li><%= msg %></li>
           <% end %>
      </ul>
</div>
<% end %>

<div class="form-group">
  <div class="field">
      <%= f.label :question_text %><br>
         <%= f.text_field :question_text, class: "form-control" %>
    </div>
 </div>

<div class="form-group">
   <div class="field">
   <%= f.label :category_id %><br>
   <%= f.number_field :category_id, class: "form-control" %>
  </div>
</div>
 <h2>Answer Options</h2>
     <%= f.fields_for :answers do |answer| %>
       <div class="form-group">
        <div class="answers">
        <div class="field">
         <%= answer.label :answer_1 %><br>
          <%= answer.text_field :answer_text, class: "form-control" %>
        </div>
        </div>
      </div>
    <% end %>
   <%= f.fields_for :answers do |answer| %>
      <div class="form-group">
        <div class="answers">
        <div class="field">
         <%= answer.label :answer_2 %><br>
          <%= answer.text_field :answer_text, class: "form-control" %>
        </div>
        </div>
      </div>
  <% end %>
      <%= f.fields_for :answers do |answer| %>
      <div class="form-group">
        <div class="answers">
        <div class="field">
         <%= answer.label :answer_3 %><br>
          <%= answer.text_field :answer_text, class: "form-control" %>
        </div>
        </div>
      </div>
  <% end %>
      <%= f.fields_for :answers do |answer| %>
      <div class="form-group">
        <div class="answers">
        <div class="field">
         <%= answer.label :answer_4 %><br>
          <%= answer.text_field :answer_text, class: "form-control" %>
        </div>
        </div>
      </div>
  <% end %>

如果我检查控制台，它可以工作！我有四个不同的答案（因此它们在表格中有四行但具有相同的question_id。奇怪的是，如果我然后使用编辑路线，而不是填充四个输入（如new那样），它显示答案的16个text_field输入（标记为答案1，答案2，答案3，答案4，答案1）。

最后，我认为可能存在问题的另一个原因是我如何通过控制器更新嵌套的Answers属性，如下所示：

def question_params
      params.require(:question).permit(:question_text, :category_id, :correct_answer, :answers_attributes => [:id, :answer_text])
 end

我是否错误地设置了它，以便在编辑文件中显示时会迭代4倍？

Answer 1

我认为在为edit操作呈现表单时，您需要做些不同的事情：

您可以尝试这样的事情：

<%= form_for(@question) do |f| %>
  <% if @question.errors.any? %>
    <div id="error_explanation">
     <h2><%= pluralize(@question.errors.count, "error") %> prohibited this question from being saved:</h2>
     <ul>
      <% @question.errors.full_messages.each do |msg| %>
         <li><%= msg %></li>
         <% end %>
    </ul>
   </div>
 <% end %>

 <div class="form-group">
  <div class="field">
    <%= f.label :title %><br>
    <%= f.text_field :title, class: "form-control" %>
  </div>
 </div>

  <% unless @question.new_record? %>
   <% @question.answers.each_with_index do |ans,i| %>
    <%= f.fields_for :answers, ans do |answer| %>
        <%= answer.label "answer_#{i+1}" %><br>
        <%= answer.text_field :answer_text, class: "form-control" %>
    <% end %>
  <% end %>
 <% else %>

  <h2>Answer Options</h2>
  <%= f.fields_for :answers, Answer.new do |answer| %>
      <%= answer.label :answer_1 %><br>
      <%= answer.text_field :answer_text, class: "form-control" %>
  <% end %>

  <%= f.fields_for :answers,Answer.new do |answer| %>
      <%= answer.label :answer_2 %><br>
      <%= answer.text_field :answer_text, class: "form-control" %>
  <% end %>

  <%= f.fields_for :answers,Answer.new do |answer| %>
       <%= answer.label :answer_3 %><br>
       <%= answer.text_field :answer_text, class: "form-control" %>
  <% end %>

  <%= f.fields_for :answers,Answer.new do |answer| %>
       <%= answer.label :answer_4 %><br>
       <%= answer.text_field :answer_text, class: "form-control" %>
  <% end %>
 <% end %>
 <%= f.submit @question.new_record? ? "Add" : "Update" %>
<% end %>

在scaffold的编辑文件中显示表单字段的多次迭代

1 个答案: