async def uppromote_discount(ns):
    """修改促销产品折扣"""
    db = DBPools()
    async with db.sqlorContext('kboss') as sor:
        try:
            promote_discount = await sor.R('promote_discount',{'id':ns.get('id')})
            providerid = (await sor.R('product', {'id': promote_discount[0]['productid']}))[0]['providerid']
            protocolid = (await sor.R('saleprotocol', {'offer_orgid': providerid}))[0]['id']
            product_discount = (await sor.R('product_salemode', {'protocolid': protocolid, 'productid': promote_discount[0]['productid']}))[0]['discount']
            if float(ns['discount']) <= float(product_discount):
                return {'status': False, 'msg': '折扣率不能小于供应商折扣'}
            await sor.U('promote_discount', ns)
            return {'status': True, 'msg': '修改成功'}
        except:
            return {'status': False, 'msg': '修改失败'}
ret = await uppromote_discount(params_kw)
return ret