gistfile1.txt

# _form.html.erb
<%= f.fields_for :options do |builder| %>
    <%= render 'option_fields', f: builder %>
<% end %>

# _option_fields.html.erb
<fieldset class='form-group'>
  <%= f.hidden_field :account_id, value: current_user.account.id %>

  <%= f.label :name, 'Option' %>
  <%= f.text_field :name, class: 'form-control' %>
  <br>
  <%= f.check_box :_destroy, class: 'form-check-input' %>
  <%= f.label :_destroy, 'Remove Option' %>

  <small id="optionHelp" class="form-text text-muted">
    (e.g. "Size" or "Color")
  </small>

  <%= f.fields_for :option_values do |builder| %>
    <%= render partial: 'option_value_fields', f: builder %>
  <% end %>
</fieldset>


# _option_value_fields.html.erb
<fieldset class='form-group'>
  <%= f.hidden_field :account_id, value: current_user.account.id %>
  <%= f.label :name, 'Value' %>
  <%= f.text_field :name, class: 'form-control' %>
  <br>
  <%= f.check_box :_destroy, class: 'form-check-input' %>
  <%= f.label :_destroy, 'Remove Value' %>

  <small id="optionValueHelp" class="form-text text-muted">
    (e.g. "Small, Medium, Large" or "Red, Green, Blue")
  </small>
</fieldset>