/** @Document
 *  @InheritanceType("COLLECTION_PER_CLASS")
 **/
class MODM116Parent
{
    /** @Id */
    private $id;

    /** @String */
    private $name;

    /** @ReferenceOne **/
    private $child;

    public function getId()
    {
        return $this->id;
    }

    public function getName()
    {
        return $this->name;
    }

    public function setName($name)
    {
        $this->name = $name;
    }

    public function getChild()
    {
        return $this->child;
    }

    public function setChild(MODM116Child $child)
    {
        $this->child = $child;
    }
}

/** @Document **/
class MODM116Child extends MODM116Parent
{
    
    /** @EmbedMany(targetDocument="MODM116Embedded") **/
    protected $embedded;
    
    function addEmbedded($parent) {
        $this->embedded[] = new MODM116Embedded($parent);
    }
}

/** @EmbeddedDocument **/
class MODM116Embedded {
    
    /** @ReferenceOne(targetDocument="MODM116Parent") **/
    protected $parent;
    
    public function __construct($parent) {
        $this->parent = $parent;
    }
    
}


$parent = new MODM116Parent();
$parent->setName('test');
$parent->setChild(new MODM116Child());
$dm->persist($parent->getChild());
$dm->persist($parent);
$dm->flush();
$dm->clear();

$parent = $dm->getRepository(get_class($parent))->findOneBy(array('name' => 'test'));

$parent->getChild()->setName('ok');
$parent->getChild()->addEmbedded($parent);
$dm->flush();