使用hibernate更新子表中的问题

我有两个表，

A&B

具有一对多关系

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>

为此，我在父pojo中使用

List

集合

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>

A

的hbm文件的代码为：

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>

在表中插入新记录时，使用

saveOrUpate（）

方法插入数据时没有任何问题。但当我再次插入相同的记录时，它会更新父表中的现有记录（这是正确的），但在子表中插入新记录，这是错误的。基本上，它应该像父表一样更新子表中的记录。我怎样才能解决这个问题

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>

谢谢

    <bag name="uifUnrecogniseSchoolDetailList" cascade="all">
        <key not-null="true" update="false">
            <column name="uif_detail_state_code"></column>
            <column name="uif_detail_district_code"></column>
            <column name="uif_detail_town_code"></column>
            <column name="uif_detail_ward_code"></column>
        </key>
        <one-to-many class="com.aises.pojo.UifUnrecogniseSchoolDetails"/>
    </bag>