tr.nested-fields
  td
    = f.select :escola_id,
        options_from_collection_for_select( \
          @escolas, :id, :nome, f.object.try(:escola_id) \
        ), { include_blank: "Selecione" },
        class: "form-control s2"
    = error_for f.object, :escola_id

  td.center
    = link_to_remove_association " Remover", f, class: "btn btn-sm btn-danger icone-anular"