hibernate的级联删除问题
我有两个表一个是news表，一个是newsType表
如下：
CREATETABLENewsType(
TypeIDintPRIMARYKEYNOTNULLidentity(1,1),
TypeNameVARCHAR(400)NOTNULL,
DirNameVARCHAR(400)NOTNULL,
TemplateNameVARCHAR(400)NOTNULL
);
CREATETABLENews
(
NewsIDintidentity(1,1)PRIMARYKEY,
TypeIDintNOTNULLreferencesNewsType(TypeID)ondeletecascade,
TitleVARCHAR(400)NOTNULL,
HitCountintDEFAULT0NOTNULL,
IssuseDatedatetimeNOTNULL,
DeployerIDintNOTNULL,
OriginVARCHAR(400)NOTNULL,
URLVARCHAR(400)NOTNULL,
KEYWORDSVARCHAR(400),
PriorityintDEFAULT0NOTNULL,
SpecialVARCHAR(400),
DescriptionVARCHAR(400),
AuthorVARCHAR(400),
TopicVARCHAR(400)
);
下面是:News.hbm.xml
<?xmlversion="1.0"?>
<!DOCTYPEhibernate-mappingPUBLIC"-//Hibernate/HibernateMappingDTD3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
MappingfileautogeneratedbyMyEclipse-HibernateTools
-->
<hibernate-mapping>
<classname="cn.model.mapping.News"table="News"schema="dbo"catalog="demo">
<idname="newsId"type="java.lang.Integer">
<columnname="NewsID"/>
<generatorclass="native"/>
</id>
<!--<propertyname="typeId"column="TypeID"type="java.lang.Integer"not-null="true"/>-->
<many-to-onename="newsType"class="cn.model.mapping.NewsType"fetch="select"insert="false"update="false">
<columnname="TypeID"not-null="true"/>
</many-to-one>
<propertyname="title"type="java.lang.String">
<columnname="Title"length="400"not-null="true"/>
</property>
<propertyname="hitCount"type="java.lang.Integer">
<columnname="HitCount"not-null="true"/>
</property>
<propertyname="issuseDate"type="java.util.Date">
<columnname="IssuseDate"length="23"not-null="true"/>
</property>
<propertyname="deployerId"type="java.lang.Integer">
<columnname="DeployerID"not-null="true"/>
</property>
<propertyname="origin"type="java.lang.String">
<columnname="Origin"length="400"not-null="true"/>
</property>
<propertyname="url"type="java.lang.String">
<columnname="URL"length="400"not-null="true"/>
</property>
<propertyname="keywords"type="java.lang.String">
<columnname="KEYWORDS"length="400"/>
</property>
<propertyname="priority"type="java.lang.Integer">
<columnname="Priority"not-null="true"/>
</property>
<propertyname="special"type="java.lang.String">
<columnname="Special"length="400"/>
</property>
<propertyname="description"type="java.lang.String">
<columnname="Description"length="400"/>
</property>
<propertyname="author"type="java.lang.String">
<columnname="Author"length="400"/>
</property>
<propertyname="topic"type="java.lang.String">
<columnname="Topic"length="400"/>
</property>
</class>
</hibernate-mapping>
NewsType.hbm.xml
<?xmlversion="1.0"?>
<!DOCTYPEhibernate-mappingPUBLIC"-//Hibernate/HibernateMappingDTD3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
MappingfileautogeneratedbyMyEclipse-HibernateTools
-->
<hibernate-mapping>
<classname="cn.model.mapping.NewsType"table="NewsType"schema="dbo"catalog="demo">
<idname="typeId"type="java.lang.Integer">
<columnname="TypeID"/>
<generatorclass="native"/>
</id>
<propertyname="typeName"type="java.lang.String">
<columnname="TypeName"length="400"not-null="true"/>
</property>
<propertyname="dirName"type="java.lang.String">
<columnname="DirName"length="400"not-null="true"/>
</property>
<propertyname="templateName"type="java.lang.String">
<columnname="TemplateName"length="400"not-null="true"/>
</property>
<setname="newses"inverse="true"cascade="all-delete-orphan">
<key>
<columnname="TypeID"not-null="true"/>
</key>
<one-to-manyclass="cn.model.mapping.News"/>
</set>
</class>
</hibernate-mapping>
当我测试的时候我要向news表里单独插入数据的时候，就出现异常：
Exceptioninthread"main"org.hibernate.exception.GenericJDBCException:couldnotinsert:[cn.model.mapping.News]
atorg.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
atorg.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
atorg.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
atorg.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:1986)
atorg.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2405)
atorg.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:37)
atorg.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
atorg.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:269)
atorg.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:167)
atorg.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)
atorg.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
atorg.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
atorg.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
atorg.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
atorg.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
atorg.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:530)
atorg.hibernate.impl.SessionImpl.save(SessionImpl.java:518)
atorg.hibernate.impl.SessionImpl.save(SessionImpl.java:514)
atcn.model.test.Test.main(Test.java:68)
Causedby:java.sql.SQLException:[Microsoft][SQLServer2000DriverforJDBC][SQLServer]无法将NULL值插入列'TypeID'，表'demo.dbo.News'；该列不允许空值。INSERT失败。
但是,要是同是向两个表里插入数据时，就能成功。是怎么回事啊？
Test.java
packagecn.model.test;
importjava.util.List;
importorg.hibernate.Query;
importorg.hibernate.Session;
importorg.hibernate.Transaction;
importcn.model.HibernateSessionFactory;
importcn.model.mapping.NewsType;
publicclassTest{
publicstaticvoidmain(Stringargs[]){
Sessionsession=HibernateSessionFactory.getSession();
Transactiontx=session.beginTransaction();
Queryquery=session.createQuery("fromNewsTypentwherent.typeId=13");
Listlist=query.list();
NewsTypenewsType=(NewsType)list.get(0);
session.delete(newsType);
session.flush();
session.close();
}
}