function save()
{
Assert::isFalse($this->isReadonly(), 'cannot save readonly collections');
$getter = $this->referentialProperty->getGetter();
$setter = $this->referentialProperty->getSetter();
if ($this->referentialProperty->getMultiplicity()->isNullable()) {
foreach ($this->getLostTracked() as $object) {
$object->{$setter}(null);
$object->save();
}
} else {
if (sizeof($this->getLostTracked())) {
$query = new EntityQuery($this->getChildren());
$this->fillQuery($query);
$query->andWhere(Expression::in($this->getChildren()->getLogicalSchema()->getIdentifier(), $this->getLostTracked()));
$query->delete();
}
}
foreach ($this->getList() as $object) {
// avoid useless mutation
if ($object->{$getter}() !== $this->getParentObject()) {
$object->{$setter}($this->getParentObject());
}
$object->save();
}
}
