phalcon: 按年分表的model怎么建？table2017,table2018...相同名的分表模型怎么建

use Phalcon\Mvc\Model;
class Ntime extends Model {

    //id
    public $id;
    //国家cid
    public $name;
    //省市id
    public $create_time;

	
	public static $table_name;
	
	public function initialize()
	{
		
		$this->setSource(self::$table_name);
	}


}

public function indexAction()
    {
        

		//一
		\Ntime::$table_name = ‘ntime2015‘;
		$result = $this->modelsManager->createBuilder()
           ->columns("id,name,create_time")
           ->from("Ntime")
            ->orderBy("id ASC")
			->getQuery()
			->execute()
			->toArray();
		
		//二
		\Ntime::$table_name = ‘ntime2017‘;
		$result = \Ntime::find([
			‘limit‘=>2	
		])->toArray();      
		
		var_dump($result);

		echo "gaga";
		exit;
    }