java - Hibernate 映射同一列两次

Question

如何解决这个问题

Repeated column in mapping for entity: com.abc.domain.PersonConnect column: PERSON_ID (should be mapped with insert="false" update="false")

这是我的 hbm 文件的片段

<class name="com.abc.domain.PersonConnect" table="PERSON_CONNECT">    
    <composite-id>
        <key-many-to-one name="Parent" class="com.abc.domain.Person" column="PARENT_PERSON_ID"/>
        <key-many-to-one name="Child" class="com.abc.domain.Person" column="CHILD_PERSON_ID"/>
    </composite-id>

    <many-to-one class="com.abc.domain.Person" fetch="select" name="parent" lazy="false" > 
        <column length="20" name="PERSON_ID" not-null="true"/> 
    </many-to-one> 
    <many-to-one class="com.abc.domain.Person" fetch="select" name="child" lazy="false" > 
        <column length="20" name="PERSON_ID" not-null="true"/> 
    </many-to-one>    
</class>

表格是这样的

人脉联系

• PK - PARENT_PERSON_ID
• PK - CHILD_PERSON_ID

人

• PK - PERSON_ID
• 姓名
• 名字

Answer 1

你的映射是错误的，这是正确的映射。在多对一方面，列名是同一个表中的列，它是引用 Person 主键的外部列。

<class name="com.abc.domain.PersonConnect" table="PERSON_CONNECT">

 <composite-id>
    <key-many-to-one name="Parent" class="com.abc.domain.Person" column="PARENT_PERSON_ID"/>
    <key-many-to-one name="Child" class="com.abc.domain.Person" column=" CHILD_PERSON_ID"/>
     </composite-id>

</class>