@Entity @Data @Table(name= "test_a") public class testA { @Id @Column private String id; @OneToMany(mappedBy = "testA"} private List testBList; } @Entity @Data @Table(name= "test_b") public class testB{ @Id @Column private String id; @Column(name = "test_a_id") private String testAId; @ManyToOne @JoinColumn(name = "reference_design_id", referencedColumnName = "id") private testA testA; } 다음과 같이 ..