使用层叠=“保存更新”保存时的休眠异常

好的，根本原因是我对集合的映射无效。感谢这篇关于复合映射的文章

错误：

<key>  <column name="ID" /></key>

正确

<many-to-one name="parent"  lazy="false" column="PARENT" /><set name="children" lazy="false" fetch="join" table="PRODUCT" cascade="all">  <key>    <column name="PARENT" />  </key>  <one-to-many  /></set>

完整的映射

<class name="Product" table="PRODUCT">        <id name="id" type="java.lang.Long" column="ID"> <generator >     <param name="sequence">PRODUCT_SN</param> </generator>        </id>        <many-to-one name="parent"  lazy="false" column="PARENT" />        <set name="children" lazy="false" fetch="join" table="PRODUCT" cascade="all"> <key>     <column name="PARENT" /> </key> <one-to-many  />        </set>        <property name="pre" type="java.lang.String" column="CODE" not-null="true" />        <property name="name" type="java.lang.String" column="NAME" />        <property name="startDate" type="java.util.Date" column="STARTDATE" />        <property name="endDate" type="java.util.Date" column="ENDDATE" />        <property name="decisionable" type="boolean" column="ISDECISIONABLE" />        <property name="selectable" type="boolean" column="ISSELECTABLE" />    </class>