Hi there,

I write a program which contains "user" and "staff" class. And the "staff" class is subclass of "user".

public class User extends BaseModel
{
protected boolean gender;

protected String name;

/* getter & setter */
}

public class Staff extends User
{
/* Link to User class ("many-to-one" relationship) */
private User supervisor;

private double salary;

/* getter & setter */
}

And in hbm file, I use "join-subclass" to configure them.

<class name="User" table="USER">
<id name="id" column="ID" type="string" length="32">
<generator class="uuid"/>
</id>

<property name="gender" column="GENDER" not-null="true" />
<property name="name" column="NAME" length="100" not-null="true" />

<joined-subclass name="com.crazysoft.db.domainobj.user.staff.Staff" table="STAFF">
<key column="ID"/>
<property name="salary" column="SALARY" not-null="true" />
<many-to-one name="supervisor" column="SUPERVISOR" class="User" not-null="true" />
</joined-subclass>
</class>

And the problem is every time, I delete the staff object, hibernate always deletes the related user object as well.

So, is there a way to only remove staff object and keep the related user object?

Thanks for help!