Cannot access protected property ::$_id about mongo-php-library

[jmikola]

Can you share your document class implementation? If the class is implementing our BSON Serializable interface, you've reached an edge case I allude to here. This requires a change to the extension (PHPC-382), which I hope to implement in 1.2.0.

I believe this would only occur for a Serializable classes, as other objects would only get their public properties encoded (protected/private properties are ignored per persistence documentation). In that case, BulkWrite::insert() would have needed to generate an ID, which would then have been returned and you'd never reach the offending code.

As a temporary work-around, we should be able to invoke bsonSerialize() from userland and capture the ID.

[jmikola]

Opened PHPLIB-157 to track this.

[veego]

My class implements \MongoDB\BSON\Persistable and I use Transistor at the moment (I added \MongoDB before BSON\... to all classes in Transistor.

class Document implements \MongoDB\BSON\Persistable {

    use Transistor;

    protected $_id;

    ...

    function __construct() {
        $this->_id  = new \MongoDB\BSON\ObjectID();
    }
    function getId() {
        return $this->_id;
    }

    ...