NHibernate尝试创建同一实体两次

目前,我有以下关联的数据库:

• 一人多案管理
• 一案多干预
• 客户、招生、案例管理是每个表的单一类
• 干预是每个表的类层次结构。

目前,如果我这样做:

var client = new Client();
clientRepo.Add(client);

var intake = new Intake();
client.Add(intake);

var caseMan = new CaseManagement();
intake.Add(caseMan);

clientRepo.Update(client);

一切正常,NHibernate在数据库中创建一个客户机,然后创建一个收信人,然后创建一个案例管理(所有这些都适当链接)。

但是,如果执行以下操作:

var client = new Client();
clientRepo.Add(client);

var intake = new Intake();
client.Add(intake);

var caseMan = new CaseManagement();
intake.Add(caseMan);

var intervention = new SubIntervention();
caseMan.Add(intervention);

clientRepo.Update(client);

它出错并运行以下SQL:

INSERT INTO TblClient ... (*)
INSERT INTO TblIntake ...
INSERT INTO TblCaseManagement ...
INSERT INTO TblClient ... (*)

其中星号线是相同的。我不知道为什么使用继承会导致这种情况。

这是我的进气类的映射(与客户机和案例管理几乎相同)。

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                   assembly="WebTracker4"
                   namespace="WebTracker4.Domain">

<!-- Class Mapping -->
<class name="Intake" table="TblIntake">

<!-- Id -->
<id name="Id" column="IntakeId">
  <generator class="sequence">
    <param name="sequence">IntakeSequence</param>
  </generator>
</id>

<!-- TCN -->
<version name="Tcn" column="IntakeTcn" type="Int64" />

<!-- Client -->    
<many-to-one name="Client" column="ClientId" class="Client" />

<!-- Case Management -->    
<bag name="CaseManagements" inverse="true" cascade="all" table="TblCaseManage" order-by="CaseManageId desc">
  <key column="IntakeId" />
  <one-to-many class="CaseManagement" />
</bag>

<!-- Properties -->
...

</class>
</hibernate-mapping>

以下是干预类层次结构的映射:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
               assembly="WebTracker4"
               namespace="WebTracker4.Domain.Interventions">

<!-- Class Mapping -->
<class name="Intervention" table="TblIntervention" abstract="true">

<!-- Id -->
<id name="Id" column="InterventionId">
  <generator class="sequence">
    <param name="sequence">InterventionSequence</param>
  </generator>
</id>

<!-- Discriminator -->
<!-- This is used so that we can have Intervention subclasses. -->
<discriminator column="InterventionType" type="String" />

<!-- TCN -->
<version name="Tcn" column="InterventionTcn" type="Int64" />  

<!-- Case Management -->
<many-to-one name="CaseManagement" column="CaseManageId" class="WebTracker4.Domain.CaseManagement, WebTracker4" />

<!-- Properties -->    
....

<!-- Assessment Subclass -->
<subclass name="SubIntervention" discriminator-value="Sub">
  ...
</subclass>

</class>

我遗漏了什么使它尝试重新添加客户端实体?同样值得注意的是,如果我把子类中的列名搞错了,NHibernate什么也不会说。

这快把我逼疯了,请帮帮我:)