物料清单获取最近单价

import clr
clr.AddReference('System')
clr.AddReference('System.Data')
clr.AddReference('Kingdee.BOS')
clr.AddReference('Kingdee.BOS.Core')
clr.AddReference('Kingdee.BOS.App')
clr.AddReference('Kingdee.BOS.ServiceHelper')
clr.AddReference('Newtonsoft.Json')

from Kingdee.BOS import *
from Kingdee.BOS.Core import *
from Kingdee.BOS.Core.Bill import *
from Kingdee.BOS.Core.DynamicForm.PlugIn import *
from Kingdee.BOS.Core.DynamicForm.PlugIn.ControlModel import *
from System import *
from System.Data import *
from System.Net import *
from System.Text import *
from System.IO import *
from Kingdee.BOS.Core.Bill.PlugIn import *
from Kingdee.BOS.App.Data import *
from System.Collections.Generic import List
from Kingdee.BOS.ServiceHelper import *
from Kingdee.BOS.Util import *

def DataChanged(e):
    if e.Field.Key == "FMATERIALIDCHILD":
        cfmid=this.Model.GetValue("FMATERIALIDCHILD",e.Row);
        if cfmid is None:
            return;
        kfj=this.Model.GetValue("F_kfbj",e.Row);
        if float(kfj)>0:
            return;
        mno=str(cfmid["Number"]);
        mid=str(cfmid["Id"]);
        cxsql="select price from  v_pur_price_for_bom where fnumber='"+mno+"'";
        cxjg=DBServiceHelper.ExecuteDynamicObject(this.Context,cxsql);
        if cxjg.Count==0:
            return;
        dj=cxjg[0][0];
        this.Model.SetValue("F_kfbj",dj,e.Row);
        this.View.InvokeFieldUpdateService("F_kfbj", 0);

create view v_pur_price_for_bom as 
with t_pur_price_latest as (
select b.fdate,a.FMATERIALID,e.FNUMBER,c.FPRICEUNITID,c.FTAXPRICE,d.FSETTLECURRID,d.FEXCHANGERATE
,row_number() over (partition by e.fnumber order by fdate desc,b.FDOCUMENTSTATUS) as id
from 
t_PUR_POOrderEntry  a with(nolock) 
,t_PUR_POOrder b with(nolock)
,t_PUR_POOrderEntry_F c with(nolock)
,T_PUR_POORDERFIN d with(nolock)
,T_BD_MATERIAL e with(nolock) 
where 
a.fid=b.fid and b.FOBJECTTYPEID = 'PUR_PurchaseOrder' 
and b.FDOCUMENTSTATUS='C' 
and c.FENTRYID=a.FENTRYID 
and d.FENTRYID=a.FENTRYID 
and e.FMATERIALID = a.FMATERIALID 
) select FMATERIALID,FNUMBER,FPRICEUNITID,FTAXPRICE,FEXCHANGERATE,FTAXPRICE*FEXCHANGERATE as price,FSETTLECURRID from t_pur_price_latest where id=1