java - 如何从子对象引用带有@MappedSuperclass注释的父对象？

Question

我如何将我的子对象引用到用@MappedSuperclass注释的父对象？这些是我的类(class):

@MappedSuperclass
public class Person extends BaseEntity {}

@Entity
@Table(name = "employee", catalog = "enrollment_system", uniqueConstraints =
@UniqueConstraint(columnNames = {"reference", "emp_number"}))
public class Employee extends Person implements Serializable{}

@MappedSuperclass
public class BackGroundHistory extends BaseEntity {

    @ManyToOne
    @JoinColumn(name = "person_id")
    @ForeignKey(name = "fk_person_history")
    private Person person;

 }

@Entity
@Table(name = "educational_history", catalog = "enrollment_system")
public class EducationalHistory extends BackGroundHistory implements java.io.Serializable {}

在运行时，我收到此错误:

线程“main”org.hibernate.AnnotationException中的异常:entities.EducationalHistory.person上的@OneToOne或@ManyToOne引用了未知实体:entities.Person

我这样做是为了避免在 BackGroundHistory 类上进行多次声明，因为除了 Employee 类之外，我还有类 Applicant 和类 学生。

Answer 1

映射的父类(super class)不是实体，它只是用于扩展或继承属性，例如 ID 、 CREATE_TIME 、 UPDATE_TIME ..etc