我有继承关系的代码：
@Entity
@Table(name = "PERSON")
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn(name = "PERSON_TYPE", discriminatorType = DiscriminatorType.STRING, length = 4)
public abstract class Person implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name="ID_PERSON_ID")
private Long id;
...other attributes
}
@Entity
@Table(name="STUDENT")
@DiscriminatorValue(value = "STUD")
public class Student extends Person implements Serializable{
@OneToMany(targetEntity = ListingRatings.class, mappedBy = "student", cascade=CascadeType.ALL, orphanRemoval=true)
private List<ListingRatings> listingRatings;
...other attributes
}
@Entity
@Table(name="LISTING_RATING")
public class ListingRatings implements Serializable{
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="ID_LISTING_RATING_ID")
private Long id;
@ManyToOne(targetEntity = Teacher .class, optional = false )
@JoinColumn(name = "ID_PERSON_ID", referencedColumnName = "ID_PERSON_ID", insertable=true , updatable=true )
private Teacher teacher;
@ManyToOne(targetEntity = Student.class, optional = false )
@JoinColumn(name = "ID_PERSON_ID", referencedColumnName = "ID_PERSON_ID")
private Student student;
...other attributes
}
@Entity
@Table(name="TEACHER")
@DiscriminatorValue(value="TEAC")
public class Teacher extends Person implements Serializable{
@OneToMany(targetEntity = ListingRatings .class, mappedBy = "teacher", fetch=FetchType.EAGER)
private List<ListingRatings> listingRatings ;
}
当我试图坚持这种关系时，我有这个例外
引起：org.hibernate.MappingException：实体映射中的重复列： cl.programarte.gym.model.ListingRatings column：ID_PERSON_ID（应使用insert =＆＃34; false＆＃34; update =＆＃34; false＆＃34;}进行映射。
我不知道这是否可行。 Changing，insertable = true，updatable = true to insertable = false，updatable = false，一切正常。 但是我需要坚持老师的身份，但事实并非如此。
也许可以为这种情况制作一个复合键？ 它推荐给你？
非常感谢。