Phalcon：如何保存数组（$ model-＆gt; create（））

Question

$ model-＆gt; create（）没有保存数组

$User= new \User();
$User->id = 1;
$User->data = [0=>123456789];
$User->create();`

$ model-＆gt; update（）成功保存数组

$User= \User::findFirst(1);
$User->data = [0=>123456789];
$User->update();

我保存了数组$ model-＆gt; create（）

class User extends Phalcon\Mvc\Model
{
    public function initialize()
    {
        $this->setConnectionService('db_id');
        $this->useDynamicUpdate(true);
    }

    public function beforeSave()
    {
        $this->data = serialize($this->data);
    }

    public function afterFetch()
    {
        $this->data = unserialize($this->data);
    }
}

phalcon version 1.3.2