risolto cosi:
codice:
namespace models;


use Illuminate\Database\Eloquent\Model as EloquentModel;


class MyEloquentModel extends EloquentModel {
  public static function beginTransaction() {
    self::getConnectionResolver()->connection()->beginTransaction();
  }


  public static function commit() {
    self::getConnectionResolver()->connection()->commit();
  }


  public static function rollBack() {
    self::getConnectionResolver()->connection()->rollBack();
  }
}
poi richiamo queste funzioni:
codice:
MyEloquentModel::beginTransaction();