sqlalchemy动态组合查询语句。

        if filter_type == 1:

            search = and_(GameRoom.status ==1,or_(

                and_(GameRoom.white_user_id == user_id,

                     GameRoom.active_player == 1),

                and_(GameRoom.black_user_id == user_id,

                     GameRoom.active_player == 0)))

        elif filter_type == 2:

            search = and_(GameRoom.status ==1,or_(

                and_(GameRoom.white_user_id == user_id,

                     GameRoom.active_player == 0),

                and_(GameRoom.black_user_id == user_id,

                     GameRoom.active_player == 1)))

        elif filter_type == 3:

            search = GameRoom.create_by == user_id

        db.session.query(GameRoom).filter(search).all()