panel/app/views/posts/template_field/_check_box.haml

- field_name = field_name_for_post_as_string(name)
= hidden_field_tag field_name, value: 'false'
.form-check
  = check_box_tag field_name,
    'true',
    value == 'true',
    class: 'form-check-input'
  = label_tag field_name, t('posts.checkbox'), class: 'form-check-label'