JPA 프로그래밍 3. Value 타입 맵핑 - KwangtaekJung/inflearn-spring-data-jpa-keesun GitHub Wiki

JPA 프로그래밍: Value 타입 맵핑

• 엔티티 타입과 Value 타입 구분

  • 식별자가 있어야 하는가.
  • 독립적으로 존재해야 하는가.

• Value 타입 종류

  • 기본 타입 (String, Date, Boolean, ...)
  • Composite Value 타입
  • Collection Value 타입
  • 기본 타입의 콜렉션
  • 컴포짓 타입의 콜렉션

• Composite Value 타입 맵핑

  • @Embeddable
  • @Embedded
  • @AttributeOverrides
  • @AttributeOverride

@Embeddable
public class Address {

    private String street;

    private String city;

    private String state;

    private String zipCode;

}

    // Account Entity
...
    @Embedded
    private Address address;

    @Embedded
    @AttributeOverrides({
            @AttributeOverride(name = "street", column = @Column(name = "office_street")),
            @AttributeOverride(name = "city", column = @Column(name = "office_city")),
            @AttributeOverride(name = "state", column = @Column(name = "office_state")),
            @AttributeOverride(name = "zipCode", column = @Column(name = "office_zipCode"))
    })
    private Address officeAddress;

• 생성된 DB 확인

springdata=# select * from account;
 id | city | state | street | zip_code |         created         | office_city | office_state | office_street | office_zip_code | password | username | yes
----+------+-------+--------+----------+-------------------------+-------------+--------------+---------------+-----------------+----------+----------+-----
  1 |      |       |        |          | 2021-08-25 10:41:07.951 |             |              |               |                 | jpa      | keesun   |
  2 |      |       |        |          | 2021-08-25 10:41:07.981 |             |              |               |                 | spring   | jung     |
(2 rows)