Programming/JPA
Join Table
Albothyl
2019. 5. 31. 18:46
별도의 테이블을 통하여 Mapping 정보를 관리한다.
- table: some_mapping_table
column: someMappingId | someEntityId | otherEntityId
@Entity
@Table(schema = "some", name = "some_entity")
public class SomeEntity extends CreatedEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long someEntityId;
private String name;
@OneToMany(fetch = FetchType.EAGER)
@JoinTable(name = "some_mapping_table",
joinColumns = @JoinColumn(name = "someEntityId"),
inverseJoinColumns = @JoinColumn(name = "otherEntityId"))
private List<OtherEntity> otherEntityList;
}
@Entity
@Table(schema = "some", name = "other_entity")
public class OtherEntity extends CreatedEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long otherEntityId;
private String name;
}