Question

我收到此异常（底部是完全例外）：

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，这似乎是最常见的原因该错误是指关联是双向的，但只有一半已设置。如：Insurance.Patient =患者被召唤但是 Patient.Insurances.Add（保险）不是。事实上，我确实有这样的场景，但我在调用之前检查了对象保存它，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a 瞬态值。在我的情况下每个对象都是暂时的，所以我就是怀疑我问题的根源在这里。然而，一切都需要现在是短暂的，因为还没有保存。我会期望NHibernate坚持不懈而不是抱怨它们不坚持。

以下是我映射的一些片段（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，问题可能是什么？

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:

Answer 1

另一种可能性是您正在保存整个对象图，并且该图是循环的，并且项不能为空。您可能会给NHibernate没有合法的订单来执行插入操作。（它应该产生一个更好的错误信息，但它产生了这个）。

如果没有看到其他来源，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为止。

Answer 2

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

Answer 3

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。您的映射是正确的，因此NHibernate将执行患者插入没有问题。然后NHibernate需要从患者那里获取密钥并将其级联到保险中。由于患者尚不存在，因此密钥不存在且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);

现在我不得不在集合项上设置Patient属性，但如果你忽略持久性，你将在代码中设置它，而不依赖于持久性策略。

Answer 4

这对我有用。这里重要的是我们References与Cascade.All() 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();

    ...
}

let xhr = new XMLHttpRequest()

function *statechange() {
    yield xhr.readyState;
}

let gen = statechange();

xhr.open("GET", myUrl, true);
xhr.onreadystatechange = function() {console.log(gen.next())};
xhr.send();

Answer 5

看起来异常发生在RepositoryBase.cs文件的第25行，可能是在你的一个瞬态对象上调用了Save（）。哪一个被保存？

另外，它可能是不相关的，因为我不熟悉Fluent语法，如果子对象（在这种情况下是保险）上有.Cascade.All吗？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”。

NHibernate - not-null属性引用null或transient值

5 个答案: