我知道“return $statement-> fetchall(PDO :: FETCH_CLASS,’modelClassName’);”但它只适用于fetchall功能？

class modelArea extends Model {

    public $areaID;
    public $postcode;

    public static function find($condition,$parameters) {
        $query = "SELECT * FROM area WHERE " . $condition;

        $statement = self::getDb()->prepare($query);
        if (!$statement->execute($parameters))
            return false;

        $query = $statement->fetch(PDO::FETCH_ASSOC);

        $a = new modelArea();

        $a->areaID = $query['areaID'];
        $a->postcode = $query['postcode'];

        return $a;
    }
}