Discriminator列映射为实体Hibernate

Question

在休眠中,是否可以将鉴别器作为实体？例如,如果我将Department作为基类,将AdminDepartment和ProcessingDepartment作为子类.DepartmentType是鉴别器,是映射到DEPT_TYPE表的实体.

Answer 1

是的,这是可能的,尽管这种关系是只读的:

@Entity @Inheritence(...)
@DiscriminatorColumn(name = "DEPT_TYPE_ID")
public class Department {
    ...
    @ManyToOne
    @JoinColumn(name = "DEPT_TYPE_ID", insertable = false, updatable = false)
    private DepartmentType deptType;
    ...
}