_single_option.html.erb

<%
require 'dropdown.rb'
custom = CustomSingleOptionSurvey.new(self, answer, answer_idx, disabled)
%>

<% if custom.dropdown? %>
  <%= custom.select_tag %>
  <%= raw custom.dropdown_javascript %>
<% end %>

<div class="radio-button-collection <%=custom.radio_button_class%>">
  <% choice = answer.choices.first %>

  <%# <% answer.question.answer_options.each_with_index do |answer_option, idx| %>
  <% custom.radio_button_options.each do |answer_option, idx| %>
    <% choice_id = "#{field_id}_choices_#{idx}" %>

    <div class="collection-input">
      <%= label_tag "#{choice_id}_body" do %>
        <%= radio_button_tag "questionnaire[responses][#{answer_idx}][choices][][body]",
                             translated_attribute(answer_option.body),
                             answer_option.id == custom.selected_option,
                             id: "#{choice_id}_body",
                             disabled: disabled %>

        <%= translated_attribute(answer_option.body) %>

        <%= hidden_field_tag "questionnaire[responses][#{answer_idx}][choices][][answer_option_id]",
                            answer_option.id,
                            id: "#{choice_id}_answer_option",
                            disabled: true %>
      <% end %>

      <% if answer_option.free_text %>
        <%= text_field_tag "questionnaire[responses][#{answer_idx}][choices][][custom_body]",
        choice.try(:custom_body),
        id: "#{choice_id}_custom_body",
        disabled: true,
        maxlength: maxlength %>
      <% end %>
    </div>
  <% end %>
</div>