async def lock_server(ns={}):
    """
    锁定设备
    :param ns:
    :return:
    """
    data = {}
    d = -1
    msg = "sql error"
    try:
        data["productid"] = ns['productid']
        data['lease_start_time'] = ns['lease_start_time']
        data['lease_end_time'] = ns['lease_end_time']
        data['count'] = int(ns['count'])
        data['update_time'] = datetime.datetime.now()
    except Exception as e:
        return {"status": False, "msg": f"get key error, please check key:{str(e)}"}
    if data['count'] <= 0:
        return {"status": False, "msg": "count must be greater than 0"}
    db = DBPools()
    async with db.sqlorContext('kboss') as sor:
        sql = "UPDATE lease_server_status SET `status` = 1 ,update_time = ${update_time}$, lease_start_time=${lease_start_time}$,lease_end_time=${lease_end_time}$ WHERE `status`=0 AND del_flg=0 AND end_date >= ${lease_end_time}$ AND productid=${productid}$ limit ${count}$"
        d = await sor.sqlExe(sql, data)
        if d == data['count']:
            sql = "update lease_server_data set stock=stock-${count}$,update_time = ${update_time}$ where productid=${productid}$ AND (stock - ${count}$) >= 0;"
            dd = await sor.sqlExe(sql, data)
            if dd:
                return {"status": True, "msg": f"success update number:{d}"}
            else:
                msg = "库存数量有误，请联系管理员核对库存数量"
                raise Exception(msg)
        else:
            if d:
                msg = f"目前只有{d}台机器，请重新填入购买数量"
            else:
                msg = "目前没有可用的机器"
            raise Exception(msg)
    return {"status": False, "msg": msg, "number": d}


ret = await lock_server(params_kw)
return ret