Merge Doctrine

merge_doctrine.php

  function myMerge(\Doctrine\ORM\EntityManager $em,  $newObject)
    {
        $newObjectId = $em->getClassMetadata(get_class($newObject))->getSingleIdReflectionProperty()->getValue($newObject);
        $existingObject = $em->getRepository(get_class($newObject))->find($newObjectId);

        $propertyAccessor = PropertyAccess::createPropertyAccessor();
        foreach (get_object_vars($existingObject) as $key => $value) {
            if ($propertyAccessor->isWritable($existingObject, $key)) {
                $propertyAccessor->setValue($existingObject, $key, $value);
            }
        }
    }