Question

我在MsSql数据库上有这些表：components, devicehardwareprofiles, componenttemplates, cashrecyclercounters

我需要通过此查询中的数据填充此变量：int capacity, loaded：

select sum(ct.capacity * cc.denomination) as capacity, sum(cc.loaded * cc.denomination) as loaded
from components c 
left outer join devicehardwareprofiles dhp 
    on dhp.deviceid = c.deviceid 
left outer join componenttemplates ct 
    on ct.hardwareprofileid = dhp.hardwareprofileid and ct.typecode = c.typecode and ct.position = 1 
left outer join cashrecyclercounters cc 
    on cc.componentid = c.componentid 
where c.deviceid = 72 and c.typecode = 155 and cc.currency = 810

如何将此SQL转换为nHibernate QueryOver表达式并获取所需数据？

增加： DTO和映射在这里：https://github.com/elscript/CashMaster

Typecode 155代表CashRecyclerHopper

我已经尝试过这一个表达式：

CashRecyclerHopper component = null;
DeviceHardwareProfile profile = null;
ComponentTemplate template = null;

var query = _cmSession.QueryOver(() => profile)
    .JoinQueryOver(x => x)
    .JoinAlias(a => a.HardwareProfileId, () => template, JoinType.LeftOuterJoin)
    .JoinAlias(b => b.DeviceId == component.ParentDevice.DeviceId, () => component, JoinType.LeftOuterJoin)
.JoinAlias(c => c.HardwareProfileId == template.HardwareProfileId, () => template, JoinType.LeftOuterJoin);

但它给了我例外：

无法确定成员（b.DeviceId == value（CashMasterWeb.Controllers.OptimizationController +＆lt;＆gt; c__DisplayClass2）.component.ParentDevice.DeviceId）


异常详细信息：System.Exception：无法确定成员   （b.DeviceId ==   值（CashMasterWeb.Controllers.OptimizationController + LT;＆GT; c__DisplayClass2）.component.ParentDevice.DeviceId）

来源错误：

第81行：ComponentTemplate template = null;第82行：第83行：                 var query = _cmSession.QueryOver（（）=＆gt; profile）第84行：.JoinQueryOver（x =＆gt; x）第85行：.JoinAlias（a =＆gt; a.HardwareProfileId，（）=＆gt;模板，JoinType.LeftOuterJoin ）

通过QueryOver连接nHibernate中的多个表

0 个答案: