스터디/JPA
오늘의 에러 [ detached entity passed to persist]
발생한 에러 (2019.11.13) org.hibernate.PersistentObjectException: detached entity passed to persist 문제 발생시 도메인 상황 @Entity @Getter @NoArgsConstructor(access = AccessLevel.PROTECTED) public class Champion { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String riotId; private String key; @Column(unique = true) private String name; @OneToMany(mappedBy = "champion", fetc..