NHibernate - not-null属性引用null或transient值 [英] NHibernate - not-null property reference a null or transient value

问题描述

我收到这个异常（底部的完整异常）：

I'm getting this exception (Full exception at the bottom):

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"

我已经做了很多谷歌和这似乎是
的最常见的原因，当关联是双向的但是只有一半
被设置时，错误是错误的。如：Insurance.Patient =患者被称为但
Patient.Insurances.Add（保险）不是。实际上，我实际上有一个
的情况，但是我在调​​用
之前检查了对象。保存它和Insurance.Patient和Patient.Insurances [0]都是
正确的对象。

I've done a lot of Googling and it seems the most common cause for that error is when an association is bi-directional but only one half has been set. As in: Insurance.Patient = Patient is called but Patient.Insurances.Add(Insurance) is not. I do, in fact, have a scenario like that but I've checked the object just before calling Save with it and both Insurance.Patient and Patient.Insurances[0] are the right objects.

此异常似乎引用的另一种可能性是
瞬态值。在我的情况下，每个对象是暂时的，所以我是
怀疑我的问题的根源在这里。然而，现在所有的东西都需要
，因为没有保存任何东西。我会
希望NHibernate坚持的事情，而不是抱怨他们是
不坚持。

The other possibility that this exception seems to reference is a transient value. In my case every object is transient so I'm suspecting the root of my problem is here. However, everything needs to be transient right now because nothing has been saved yet. I would expect NHibernate to persist things rather than complain that they are not persisted.

这里是我的映射（流利）的一些片段：

Here are some snippets from my mappings (fluent):

       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，什么可以问题？

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:

推荐答案

另一种可能性是你保存整个对象图，该图是循环的，项不能为空。你可以给NHibernate做这些插入的法律命令。 （它应该会产生一个更好的错误信息，但它会生成这个）。

Another possibility is that you're saving an entire object graph, and that graph is circular, and items cannot be null. You could be giving NHibernate no legal order in which to do the inserts. (It should produce a better error message, but it produces this one).

没有看到其余的源代码，很难有更多的帮助。尝试从映射中删除实体（而不保存它们），直到找出导致问题的原因。

Without seeing the rest of the source, it's hard to be of more help. Try removing entities from the mappings (and not saving them) until you can figure out what is causing the problem.

这篇关于NHibernate - not-null属性引用null或transient值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！