gistfile1.txt

    <div class='form-group'>
      %= model_errors_for 'person_roles', max_errors=>1, class=>'alert alert-danger', role=>'alert';
      <fieldset class="border p-2">
        <legend  class="w-auto"><%= $model->human_attribute_name('person_roles')  %></legend>
        %= checkbox_from_related 'person_roles', 'role', label => 1, checkbox_attrs => +{class=>'form-check-input'}, begin
        <div class="form-check">
          % my ($checkbox, $label) = @_;
          %= $checkbox;
          %= $label;
        </div>
        % end
      </fieldset>
    </div>