java - 一对一连接表级联删除

Question

我遇到了连接表上单向一对一关联的级联删除问题。例如:

xml 声明为:

<class name="Person">
<id name="id" column="personId">
    <generator class="native"/>
</id>
<join table="PersonAddress" 
    optional="true">
    <key column="personId" 
        unique="true"/>
    <many-to-one name="address"
        column="addressId" 
        not-null="true"
        unique="true"/>
</join>
</class>

<class name="Address">
<id name="id" column="addressId">
    <generator class="native"/>
</id>
</class> 

表格是

create table Person ( personId bigint not null primary key )
create table PersonAddress ( personId bigint not null primary key, addressId bigint not null   unique )
create table Address ( addressId bigint not null primary key )

我想通过配置Hibernate XML声明来实现当从person表中删除person时，personAddress表中的person也被删除。我到处寻找，但找不到解决方案。最后的选择是手动编写删除代码，但如果 Hibernate 能够支持它，我不喜欢它。请帮忙。谢谢!

Answer 1

您应该能够将级联添加到多对一元素:

<many-to-one name="address"
    column="addressId" 
    not-null="true"
    unique="true"
    cascade="delete"

/>