def get_next_id(self):
        try:
            query = {'_id': 'last_id'}
            update = {'$inc': {'id': 1}}
            fn = self.db.internal.find_and_modify
            row = fn(query, update, upsert=True, new=True)
        except Exception as e:
            raise DatabaseException(e)
        return row['id']
def do_register_cli_opts(opt, ignore_errors=False):
    # TODO: This function has broken name, it should work with lists :/
    if not isinstance(opt, (list, tuple)):
        opts = [opt]
    else:
        opts = opt

    try:
        cfg.CONF.register_cli_opts(opts)
    except:
        if not ignore_errors:
            raise