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 _draw_more_comments(self, win, data):

        n_rows, n_cols = win.getmaxyx()
        n_cols -= 1

        self.term.add_line(win, '{body}'.format(**data), 0, 1)
        self.term.add_line(
            win, ' [{count}]'.format(**data), attr=curses.A_BOLD)

        attr = Color.get_level(data['level'])
        self.term.addch(win, 0, 0, self.term.vline, attr)

        return attr | self.term.vline