public function write($sessionId, $data)
{
/**
* @var \ManaPHP\Http\Session\Adapter\Db\Model $model ;
*/
$model = new $this->_model();
$model->session_id = $sessionId;
$model->data = $data;
$model->expired_time = time() + $this->_ttl;
$model->save();
return true;
}