小编Ram*_*mar的帖子

我在使用 Spring Data JPA 的 Spring Boot 应用程序中有以下实体类

@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "branch_type", discriminatorType = DiscriminatorType.STRING)
public class Branch {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(unique = true, name = "branch_id")
    private String branchId;
}

@Entity
@DiscriminatorValue("LOCAL")
public class LocalBranch extends Branch {
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "division_head_id", referencedColumnName = "branch_id")
    private DivisionHead divisionHead;

    // other fields and mappings

    // getters and setters
}

@Entity
@DiscriminatorValue("DIVISION")
public class DivisionHead extends Branch {
    @ManyToOne(fetch = FetchType.LAZY) …