Railsfields_for在fields_for行中不与父ID关联

Question

I am trying to add some custom questions to the bottom of my form. However the id of the question isn't being associated with the answer field. How would I go about this?

input.html.erb

<% @event.event_questions.each do |question| %>
  <%= f.simple_fields_for :event_question, question do |answer| %>
    <%= answer.simple_fields_for :event_answer do |e| %>
      <%= e.input :answer, label: question.question %>
    <% end %>
  <% end %>
<% end %>

output.html

<div class="form-group string required participant_event_question_event_answer_answer"><label class="string required control-label" for="participant_event_question_event_answer_answer"><abbr title="required">*</abbr> Goals</label><input class="string required form-control" type="text" name="participant[event_question][event_answer][answer]" id="participant_event_question_event_answer_answer" /></div>
<div class="form-group string required participant_event_question_event_answer_answer"><label class="string required control-label" for="participant_event_question_event_answer_answer"><abbr title="required">*</abbr> Action Plan</label><input class="string required form-control" type="text" name="participant[event_question][event_answer][answer]" id="participant_event_question_event_answer_answer" /></div>
<div class="form-group string required participant_event_question_event_answer_answer"><label class="string required control-label" for="participant_event_question_event_answer_answer"><abbr title="required">*</abbr> Vision</label><input class="string required form-control" type="text" name="participant[event_question][event_answer][answer]" id="participant_event_question_event_answer_answer" /></div>

Answer 1

Assuming you have question_id in answers table, you can try the below code.

<% @event.event_questions.each do |question| %>
  <%= f.simple_fields_for :event_question, question do |answer| %>
    <%= answer.simple_fields_for :event_answer do |e| %>
      <%= e.input :answer, label: question.question %>
      <%= e.input :question_id, as: :hidden, input_html: { :value => question.id }
    <% end %>
  <% end %>
<% end %>