如何在rails中为所选记录创建nested_attributes的文本字段？

Question

我有三个模型报告，问题，答案

答案

belong_to :question

问题

belong_to :reports
has_many :answers, :dependent => :destroy  
accepts_nested_attributes_for :answers, :allow_destroy => true

报告

has_many :questions, :dependent => :destroy  
accepts_nested_attributes_for :questions, :allow_destroy => true

在创建新报告时，会随机选择一些问题，以便以这种方式添加到报告和展示表单中：

报告表

    <%= form_for @report do |f| %>
    <div class="field">
        <%= f.fields_for :questions do |builder| %>
          <%= render "question_fields", :f => builder %>
        <% end %>
    </div>
    <div class="actions">
        <%= f.submit "Submit Report"%>
    </div>
    <% end %>

---部分问题_字段---

<h4 class="question_name">
    <%= f.object.name %>
</h4>

<%= f.fields_for :answers do |answer,index| %>  
    <%= render 'answer_fields', :f => answer %>  
<% end %>

---部分答案_字段---              ＆lt;％= f.text_field：name，：placeholder =＆gt; “在这里添加你的答案”％＆gt;     

但是当我尝试编辑/创建新报告时，它会获取该特定问题的所有现有答案。我希望实现类似的东西：

---部分问题_字段---

<h4 class="ques_title">
    <%= f.object.name %>
</h4>

<% f.object.answers_for_report(@report).each do |answer| %>  
    <%= render 'answer_fields', :f => answer %>  
<% end %>

---部分问题_字段---

  <b>What should be code here so that it again acts same as nested attributes and gets updated succesfully !!!</b>

问题模型

belong_to :reports
has_many :answers, :dependent => :destroy  
accepts_nested_attributes_for :answers, :allow_destroy => true

def answers_for_report(@report)
    self.answers.where("report_id = ? ",report.id)
end

Answer 1

以下是我的问题的答案：

报告表格就像

<%= form_for @report do |f| %>
<div class="field">
    <%= f.fields_for :questions do |builder| %>
      <%= render "question_fields", :f => builder %>
    <% end %>
</div>
<div class="actions">
    <%= f.submit "Submit Report"%>
</div>
<% end %>

然后问题'question_fields'就像

<%= question.fields_for :answers, question.object. answers_for_report(@report) do |answer| %>  
    <%= render 'answer_fields', :f => answer %>  
<% end %>

这仅传递答案记录的集合/集合，并仅为这些选定答案呈现字段。