fields_for没有嵌套属性

Question

我有这样的表格：

<%= form_for(:quiz_responses, url: quiz_responses_path) do |f| %>

<%= f.hidden_field :name, value: @survey.name %>

<%= fields_for :questions do |ff| %>
<% @questions.each do |question| %>
<ul> 
<%= ff.hidden_field "#{question_counter}", value: question.content %>
<%= ff.label question.content %>

<%= fields_for :answers do |fff| %>
<% question.answers.each do |answer| %>

<%= fff.hidden_field "#{answer_counter}", value: answer.content %>
<% answer_counter += 1 %>
<%= fff.label answer.content %>

<%= f.radio_button("user_answer[#{user_answer_counter}]", answer.content) %>


<% end #questions.answers.each do %>
<% end #fields_for answers %>
<% user_answer_counter += 1 %>
</ul>
<% question_counter += 1 %>
<% end #@questions.each do %>

<% end #fields_for questions %> 

<%= f.submit %>
<% end #form_for%> 

我想要的结果是我得到一个params哈希：quiz_responses包含：问题哈希，并且该哈希中的每个问题值包含：答案哈希包含答案。但这就是我所看到的：

其中包含所有问题的问题哈希和包含所有答案的单独答案哈希，以及在quiz_responses中的某种方式user_answeris。我该如何解决这个烂摊子？

Answer 1

您需要在表单对象上调用fields_for，如下所示：

<%= form_for(:quiz_responses, url: quiz_responses_path) do |f| %>

  # ...

  <%= f.fields_for :questions do |ff| %>

  # ...

  <%= ff.fields_for :answers do |fff| %>

  # ...