def METHOD_NAME(self, request, obj, form, change):
    """
    Model-save hook.
    Args:
        request (Request): Incoming request.
        obj (Object): Database object.
        form (Form): Form instance.
        change (bool): If this is a change or a new object.
    """
    obj.save()
    if not change:
        # adding a new object
        # have to call init with typeclass passed to it
        obj.set_class_from_typeclass(typeclass_path=obj.db_typeclass_path)