Expected behavior

when calling ->getChildren() on newly created object (before the first save), empty array should be returned.

Actual behavior

In version 10.2.7 (not sure in which version exactly this change happened) newly created objects have id=null before the first save. As a result, Doctrine\DBAL\Exception\SyntaxErrorException exception is thrown.

Steps to reproduce

Create a new object of class that inherits from AbstractObject class. Do not save that object. Call ->getChildren() method on it.