Html 表单不在HAML中呈现

很难解释我的问题，所以我会发布相关代码，希望这会更有意义

我有一张表格，包括第二张表格

_form.html.haml：

= form_for @question, :html => { :class => "form-horizontal" } do |f|
  ...
  %h3 Parts

  %ul
    = f.fields_for :question_parts, @question.question_parts do |builder|
      = render 'question_part_fields', f: builder
      = link_to_add_fields 'Add Part', f, :question_parts

  .form-group
    .col-sm-offset-2.col-sm-10
      = f.submit :class => 'btn btn-primary'

%li.question_parts
.......
    = f.fields_for :correct_answer do |builder|
      = render 'correct_answer_fields', f: builder

    .form-group
      .col-sm-offset-2.col-sm-10
        = f.hidden_field :_destroy
        = link_to 'Remove Part', '#', class: 'remove_fields'
    %hr

.form-group
  = f.label :correct_answer, :class => 'col-sm-2 control-label'
  .col-sm-10
    %h5 Raw (text, ASCIImath)
    = f.text_area :content, :class => 'form-control'
    %h5 Preview
    #answer_preview

_问题_part_fields.html.haml：

= form_for @question, :html => { :class => "form-horizontal" } do |f|
  ...
  %h3 Parts

  %ul
    = f.fields_for :question_parts, @question.question_parts do |builder|
      = render 'question_part_fields', f: builder
      = link_to_add_fields 'Add Part', f, :question_parts

  .form-group
    .col-sm-offset-2.col-sm-10
      = f.submit :class => 'btn btn-primary'

%li.question_parts
.......
    = f.fields_for :correct_answer do |builder|
      = render 'correct_answer_fields', f: builder

    .form-group
      .col-sm-offset-2.col-sm-10
        = f.hidden_field :_destroy
        = link_to 'Remove Part', '#', class: 'remove_fields'
    %hr

.form-group
  = f.label :correct_answer, :class => 'col-sm-2 control-label'
  .col-sm-10
    %h5 Raw (text, ASCIImath)
    = f.text_area :content, :class => 'form-control'
    %h5 Preview
    #answer_preview

_更正\u答案\u fields.html.haml：

= form_for @question, :html => { :class => "form-horizontal" } do |f|
  ...
  %h3 Parts

  %ul
    = f.fields_for :question_parts, @question.question_parts do |builder|
      = render 'question_part_fields', f: builder
      = link_to_add_fields 'Add Part', f, :question_parts

  .form-group
    .col-sm-offset-2.col-sm-10
      = f.submit :class => 'btn btn-primary'

%li.question_parts
.......
    = f.fields_for :correct_answer do |builder|
      = render 'correct_answer_fields', f: builder

    .form-group
      .col-sm-offset-2.col-sm-10
        = f.hidden_field :_destroy
        = link_to 'Remove Part', '#', class: 'remove_fields'
    %hr

.form-group
  = f.label :correct_answer, :class => 'col-sm-2 control-label'
  .col-sm-10
    %h5 Raw (text, ASCIImath)
    = f.text_area :content, :class => 'form-control'
    %h5 Preview
    #answer_preview

问题是，当我加载表单时，所有不同的部分都会正确加载，但当我单击“添加部分”时，它会呈现“问题”部分字段，而不是“正确答案”字段

你知道这是为什么吗？我该怎么解决

---

谢谢

我从未使用过haml，但读到这篇文章，我有一个问题：你确定@question.question\u parts完全符合你的期望吗？如果我问了一个愚蠢的问题，请原谅。嗨，是的，@questions可以有不同的部分，即…question\u parts，但你确定@question.question\u parts不是空的或什么的吗？是的，我非常确定…而且(u question\u parts）表单呈现得非常好，没有呈现的是(u correct\u answer\u)字段…我很抱歉。在我看来，语法是不同的。在|表单上，您有f.fields|u for:question|parts，@question.question|parts do | builder |而在| question|parts |字段上，您有f.fields|u for:correct|response do | builder |注意缺少的@question.question|parts。还是我说错了什么？