24

我得到了这个例外（底部的完全例外）：

NHibernate.PropertyValueException was unhandled by user code
 Message="not-null property references a null or transient
valueClearwave.Models.Encounters.Insurance.Patient"
 Source="NHibernate"
 EntityName="Clearwave.Models.Encounters.Insurance"
 PropertyName="Patient"

我做了很多谷歌搜索，似乎最常见的错误原因是关联是双向的，但只设置了一半。如： Insurance.Patient = Patient 被调用但 Patient.Insurances.Add(Insurance) 不是。事实上，我确实有这样的场景，但我在使用它调用 Save 之前检查了该对象，Insurance.Patient 和 Patient.Insurances[0] 都是正确的对象。

此异常似乎引用的另一种可能性是瞬态值。在我的情况下，每个对象都是瞬态的，所以我怀疑我的问题的根源就在这里。但是，现在一切都需要是暂时的，因为尚未保存任何内容。我希望 NHibernate 坚持一些事情，而不是抱怨他们没有坚持下去。

以下是我的映射中的一些片段（流利）：

       public PatientMap()
       {
           WithTable("tPatient");

           Id(x => x.Id, "uid_Patient").GeneratedBy.GuidComb
().Access.AsReadOnlyPropertyThroughCamelCaseField();

           HasMany(x => x.Insurances).WithKeyColumn("uid_Patient")
               .Cascade.All()
               .Inverse();

          ...
       }

      public InsuranceMap()
       {
           WithTable("tPatientInsuranceInfo");

           Id(x => x.Id,
"uid_PatientInsuranceInfo").GeneratedBy.GuidComb
().Access.AsReadOnlyPropertyThroughCamelCaseField();

           References(x => x.Patient, "uid_Patient").Not.Nullable
().Cascade.All();

           ...
        }

那么，可能是什么问题？

NHibernate.PropertyValueException was unhandled by user code
 Message="not-null property references a null or transient
valueClearwave.Models.Encounters.Insurance.Patient"
 Source="NHibernate"
 EntityName="Clearwave.Models.Encounters.Insurance"
 PropertyName="Patient"
 StackTrace:
      at NHibernate.Engine.Nullability.CheckNullability(Object[]
values, IEntityPersister persister, Boolean isUpdate)
      at
NHibernate.Event.Default.AbstractSaveEventListener.PerformSaveOrReplicate
(Object entity, EntityKey key, IEntityPersister persister, Boolean
useIdentityColumn, Object anything, IEventSource source, Boolean
requiresImmediateIdAccess)
      at
NHibernate.Event.Default.AbstractSaveEventListener.PerformSave(Object
entity, Object id, IEntityPersister persister, Boolean
useIdentityColumn, Object anything, IEventSource source, Boolean
requiresImmediateIdAccess)
      at
NHibernate.Event.Default.AbstractSaveEventListener.SaveWithGeneratedId
(Object entity, String entityName, Object anything, IEventSource
source, Boolean requiresImmediateIdAccess)
      at
NHibernate.Event.Default.DefaultMergeEventListener.EntityIsTransient
(MergeEvent event, IDictionary copyCache)
      at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge
(MergeEvent event, IDictionary copyCache)
      at NHibernate.Impl.SessionImpl.FireSaveOrUpdateCopy(IDictionary
copiedAlready, MergeEvent event)
      at NHibernate.Impl.SessionImpl.SaveOrUpdateCopy(String
entityName, Object obj, IDictionary copiedAlready)
      at
NHibernate.Engine.CascadingAction.SaveUpdateCopyCascadingAction.Cascade
(IEventSource session, Object child, String entityName, Object
anything, Boolean isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeToOne(Object child, IType
type, CascadeStyle style, Object anything, Boolean
isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeAssociation(Object child,
IType type, CascadeStyle style, Object anything, Boolean
isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeProperty(Object child,
IType type, CascadeStyle style, Object anything, Boolean
isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeOn(IEntityPersister
persister, Object parent, Object anything)
      at
NHibernate.Event.Default.AbstractSaveEventListener.CascadeBeforeSave
(IEventSource source, IEntityPersister persister, Object entity,
Object anything)
      at
NHibernate.Event.Default.DefaultMergeEventListener.EntityIsTransient
(MergeEvent event, IDictionary copyCache)
      at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge
(MergeEvent event, IDictionary copyCache)
      at NHibernate.Impl.SessionImpl.FireSaveOrUpdateCopy(IDictionary
copiedAlready, MergeEvent event)
      at NHibernate.Impl.SessionImpl.SaveOrUpdateCopy(String
entityName, Object obj, IDictionary copiedAlready)
      at
NHibernate.Engine.CascadingAction.SaveUpdateCopyCascadingAction.Cascade
(IEventSource session, Object child, String entityName, Object
anything, Boolean isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeToOne(Object child, IType
type, CascadeStyle style, Object anything, Boolean
isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeAssociation(Object child,
IType type, CascadeStyle style, Object anything, Boolean
isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeProperty(Object child,
IType type, CascadeStyle style, Object anything, Boolean
isCascadeDeleteEnabled)
      at NHibernate.Engine.Cascade.CascadeOn(IEntityPersister
persister, Object parent, Object anything)
      at
NHibernate.Event.Default.AbstractSaveEventListener.CascadeBeforeSave
(IEventSource source, IEntityPersister persister, Object entity,
Object anything)
      at
NHibernate.Event.Default.DefaultMergeEventListener.EntityIsTransient
(MergeEvent event, IDictionary copyCache)
      at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge
(MergeEvent event, IDictionary copyCache)
      at NHibernate.Event.Default.DefaultMergeEventListener.OnMerge
(MergeEvent event)
      at NHibernate.Impl.SessionImpl.FireSaveOrUpdateCopy(MergeEvent
event)
      at NHibernate.Impl.SessionImpl.SaveOrUpdateCopy(Object obj)
      at Clearwave.Models.Data.Util.RepositoryBase`2.Save(EntityType&
entity) in C:\Projects\ClearWave\Src\Common\Domain Models
\Clearwave.Models.Data-NHibernate\Util\RepositoryBase.cs:line 25
      at IntegrationWebServices.FromMirth.SubmitMessage(Message
theMessage, Guid providerOrganizationId)
      at SyncInvokeSubmitMessage(Object , Object[] , Object[] )
      at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke
(Object instance, Object[] inputs, Object[]& outputs)
      at
System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin
(MessageRpc& rpc)
 InnerException:
4

5 回答 5

18

另一种可能性是您正在保存整个对象图，并且该图是圆形的，并且项目不能为空。您可能没有给 NHibernate 提供执行插入的法律命令。（它应该产生更好的错误消息，但它会产生这个）。

如果没有看到源的其余部分，很难获得更多帮助。尝试从映射中删除实体（而不是保存它们），直到找出导致问题的原因。

于 2009-02-21T14:33:56.860 回答
10

不确定它是否有帮助，但这对我有用。

<many-to-one name="Company" column="CompanyId" cascade="all" not-null="true"/>

cascade="all" 是我之前错过的

于 2010-07-31T17:40:10.393 回答
8

我最近遇到了这个问题，它与 NHibernate 双向关系的持久化方式有关。您的映射正确，因此 NHibernate 将执行 Patient insert 没有问题。然后 NHibernate 需要从患者那里获取密钥并将其级联到保险中。由于 Patient 尚不存在，因此密钥不存在，因此无法执行第二次插入。关键是在持久化之前通过代码设置关系，如下所示：

patient = new Patient();
patient.Insurances.Add( new Insurance{ Patient = patient } );
repository.Save( patient);

现在，您必须在集合项上设置 Patient 属性对我来说很陌生，但是如果您一起忽略持久性，您将在代码中设置它，而与您的持久性策略无关。

于 2009-10-06T21:20:39.450 回答
1

这对我有用。这里重要的事情是我们有References，我们Cascade.All()没有Inverse()HasMany

public PatientMap()
{
    HasMany(x => x.Insurances)
        .WithKeyColumn("uid_Patient")
        .Cascade.All();

    ...
}

public InsuranceMap()
{
    References(x => x.Patient, "uid_Patient")
        .Not.Nullable()
        .Cascade.All();

    ...
}
于 2016-05-13T17:55:11.613 回答
0

看起来异常源自您的 RepositoryBase.cs 文件的第 25 行，大概是在您的一个瞬态对象上调用 Save() 时。哪一个得救了？

此外，由于我不熟悉 Fluent 语法，它可能无关紧要，子对象（在这种情况下是保险）是否应该有 .Cascade.All 呢？在标准 XML 模式语法中，只有父映射在子对象集合上具有 cascade="all"。

于 2009-02-20T14:45:40.317 回答