嵌套对象（来自DQL select的混合结果）

I have a doctrine2 query like this:

$query = $this -> doctrine -> em -> createQuery ("SELECT a, b FROM ORM\Dynasties2\Maillinks a JOIN a.msgId b");

It returns mixed results, similar to this:

ORM\Dynasties2\Maillinks Object 
( 
    [id:ORM\Dynasties2\Millinks:private] => 1 
    [toUser:ORM\Dynasties2\Maillinks:private] => 16 
    [isRead:ORM\Dynasties2\Maillinks:private] => 0 
    [msgId:ORM\Dynasties2\Maillinks:private] => ORM\Dynasties2\Mailmsgs Object 
    ( 
        [id:ORM\Dynasties2\Mailmsgs:private] => 1 
        [msgText:ORM\Dynasties2\Mailmsgs:private] => asdfasdfasdfasdfasdfasdf 
        [fromUser:ORM\Dynasties2\Mailmsgs:private] => 13 
        [timeStamp:ORM\Dynasties2\Mailmsgs:private] => DateTime Object 
        (       
            [date] => 2012-04-20 12:17:29 
            [timezone_type] => 3 
            [timezone] => America/Los_Angeles 
        ) 
        [onTurn:ORM\Dynasties2\Mailmsgs:private] => 1 
        [importance:ORM\Dynasties2\Mailmsgs:private] => 2 
        [msgType:ORM\Dynasties2\Mailmsgs:private] => 1 
    ) 
)

I can access some of the data, at the 'top' easily enough.
echo $row -> getToUser(); returns '16'

I tried echo $row -> msgId-> getMsgText(); but that returns Fatal error: Cannot access private property ORM\Dynasties2\Maillinks::$msgId

How do I access the data in the objects within?

Or: is my query and result broken? Do I need to do something different with my query or entities?

Does this not work for you?

$row->getMsgId()->getMsgText();

You should be able to check the actual entities files ( whether you had doctrine build them, or someone else did ) to check the getters and setters for that entity.