休眠致命错误答案

【问题标题】：nhibernate fatal error休眠致命错误
【发布时间】：2012-09-08 01:29:06
【问题描述】：

执行此代码时出现错误（System.InvalidCastException：无法将“AccountProxy”类型的对象转换为“System.String”类型。）

我映射了数据库 opengts（开源）的表（Account,AccountString,EventData,...）
当我从 EventData.cs 调用函数时出现此错误

IQuery 查询 = session.CreateQuery("FROM Eventdata"); IList pets = query.List(); 归还宠物；

堆栈跟踪：

[InvalidCastException: Impossible d'effectuer un cast d'un objet de type 'AccountProxy' en type 'System.String'.]
   (Object , Object[] , SetterCallback ) +431
   NHibernate.Bytecode.Lightweight.AccessOptimizer.SetPropertyValues(Object target, Object[] values) +20
   NHibernate.Tuple.Component.PocoComponentTuplizer.SetPropertyValues(Object component, Object[] values) +49
   NHibernate.Type.ComponentType.SetPropertyValues(Object component, Object[] values, EntityMode entityMode) +34
   NHibernate.Type.ComponentType.ResolveIdentifier(Object value, ISessionImplementor session, Object owner) +150
   NHibernate.Type.ComponentType.NullSafeGet(IDataReader rs, String[] names, ISessionImplementor session, Object owner) +42
   NHibernate.Loader.Loader.GetKeyFromResultSet(Int32 i, IEntityPersister persister, Object id, IDataReader rs, ISessionImplementor session) +93
   NHibernate.Loader.Loader.GetRowFromResultSet(IDataReader resultSet, ISessionImplementor session, QueryParameters queryParameters, LockMode[] lockModeArray, EntityKey optionalObjectKey, IList hydratedObjects, EntityKey[] keys, Boolean returnProxies) +92
   NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) +675
   NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) +129
   NHibernate.Loader.Loader.DoList(ISessionImplementor session, QueryParameters queryParameters) +116

[GenericADOException: could not execute query
[ select eventdata0_.deviceID as deviceID5_, eventdata0_.timestamp as timestamp5_, eventdata0_.statusCode as statusCode5_, eventdata0_.accountID as accountID5_, eventdata0_.latitude as latitude5_, eventdata0_.longitude as longitude5_, eventdata0_.gpsAge as gpsAge5_, eventdata0_.speedKPH as speedKPH5_, eventdata0_.heading as heading5_, eventdata0_.altitude as altitude5_, eventdata0_.transportID as transpo11_5_, eventdata0_.inputMask as inputMask5_, eventdata0_.outputMask as outputMask5_, eventdata0_.address as address5_, eventdata0_.DataSource as DataSource5_, eventdata0_.rawdata as rawdata5_, eventdata0_.distanceKM as distanceKM5_, eventdata0_.odometerKM as odometerKM5_, eventdata0_.geozoneIndex as geozone19_5_, eventdata0_.geozoneID as geozoneID5_, eventdata0_.creationTime as creatio21_5_ from eventdata eventdata0_ ]
[SQL: select eventdata0_.deviceID as deviceID5_, eventdata0_.timestamp as timestamp5_, eventdata0_.statusCode as statusCode5_, eventdata0_.accountID as accountID5_, eventdata0_.latitude as latitude5_, eventdata0_.longitude as longitude5_, eventdata0_.gpsAge as gpsAge5_, eventdata0_.speedKPH as speedKPH5_, eventdata0_.heading as heading5_, eventdata0_.altitude as altitude5_, eventdata0_.transportID as transpo11_5_, eventdata0_.inputMask as inputMask5_, eventdata0_.outputMask as outputMask5_, eventdata0_.address as address5_, eventdata0_.DataSource as DataSource5_, eventdata0_.rawdata as rawdata5_, eventdata0_.distanceKM as distanceKM5_, eventdata0_.odometerKM as odometerKM5_, eventdata0_.geozoneIndex as geozone19_5_, eventdata0_.geozoneID as geozoneID5_, eventdata0_.creationTime as creatio21_5_ from eventdata eventdata0_]]
   NHibernate.Loader.Loader.DoList(ISessionImplementor session, QueryParameters queryParameters) +213
   NHibernate.Loader.Loader.ListIgnoreQueryCache(ISessionImplementor session, QueryParameters queryParameters) +18
   NHibernate.Loader.Loader.List(ISessionImplementor session, QueryParameters queryParameters, ISet`1 querySpaces, IType[] resultTypes) +79
   NHibernate.Hql.Ast.ANTLR.Loader.QueryLoader.List(ISessionImplementor session, QueryParameters queryParameters) +51
   NHibernate.Hql.Ast.ANTLR.QueryTranslatorImpl.List(ISessionImplementor session, QueryParameters queryParameters) +231
   NHibernate.Engine.Query.HQLQueryPlan.PerformList(QueryParameters queryParameters, ISessionImplementor session, IList results) +369
   NHibernate.Impl.SessionImpl.List(String query, QueryParameters queryParameters, IList results) +317
   NHibernate.Impl.SessionImpl.List(String query, QueryParameters parameters) +282
   NHibernate.Impl.QueryImpl.List() +163
   DATA1.EventdataExtensions.GetEventdata() in C:\Users\HP\Desktop\our_project\DATA1\Queries\Eventdata.cs:33
   MvcApplication7.Controllers.HistoriqueController.Index() in C:\Users\HP\Desktop\our_project\MvcApplication7\Controllers\HistoriqueController.cs:17
   lambda_method(Closure , ControllerBase , Object[] ) +62
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +208
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +263
   System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
   System.Web.Mvc.Controller.ExecuteCore() +116
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8841105
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

有什么建议吗？如何纠正这个错误

数据实体类（摘自评论）：

public class MyClass
    {
        public virtual string DeviceID { get; set; }
        public virtual int Timestamp { get; set; }
        public virtual string Account { get; set; }
        public virtual int StatusCode { get; set; }
        public virtual double Latitude { get; set; }
        public virtual double Longitude { get; set; }
        public virtual int GpsAge { get; set; }
        public virtual double SpeedKPH { get; set; }
        public virtual double Heading { get; set; }

        public override bool Equals(object obj)
        {
            return true;
        }

        public override int GetHashCode()
        {
            return 0;
        }


    }

【问题讨论】：

你能发布你的实体类代码吗？当 NHibernate 尝试在您的一个属性上使用 setter 时，似乎会发生错误。
public virtual string DeviceID {get;set;} public virtual int Timestamp { get;放; } 公共虚拟字符串帐户 { 获取；放; } 公共虚拟 int 状态码 { 获取；放; } 公共虚拟双纬度 { 得到；放; } 公共虚拟双经度 { 获取；放; } 公共虚拟 int GpsAge { 获取；放; } 公共虚拟双 SpeedKPH { 获取；放; } 公共虚拟双标题 { 获取；放; } public override bool Equals(object obj){return true;} public override int GetHashCode(){return 0;}
我添加了这一行：config.SetProperty(NHibernate.Cfg.Environment.ProxyFactoryFactoryClass,"NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle") 但错误变为：Method 'IsInstrumented'类型“NHibernate.ByteCode.Castle.ProxyFactoryFactory”程序集“NHibernate.ByteCode.Castle,Version=2.1.2.4000，Culture = 中性，PublicKeyToken = aa95f207798dfdb4”没有实现。[UnableToLoadProxyFactoryFactoryException：无法加载类型“NHibernate.ByteCode.Castle。 ProxyFactoryFactory, NHibernate.ByteCode.Castle'代理工厂类的配置过程中。
请编辑您的帖子，而不是不可读的 cmets。
我添加了这一行：config.SetProperty(NHibernate.Cfg.Environment.ProxyFactoryFactoryClass,"NHiberna‌te.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle") but the error become: Method 'IsInstrumented' type 'NHibernate.ByteCode.Castle.ProxyFactoryFactory'assembly 'NHibernate.ByteCode.Castle,Version=2.1.2.4000, Culture = neutral, PublicKeyToken = aa95f207798dfdb4' has no implementation.[UnableToLoadProxyFactoryFactoryException: Unable to load type 'NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle'during configuration of proxy factory class.

标签： c# asp.net nhibernate mapping

【解决方案1】：

您没有显示映射，但是基于错误消息和 MyClass 有一个名为 Account 的字符串属性的事实，我猜您已经告诉 NHibernate 将 Account 类型的对象映射到该属性。由于该属性不是 Account 类型，这将失败。

【讨论】：