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java - JPA: Embedding an entity for one case, but linking it in another

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

java - JPA: Embedding an entity for one case, but linking it in another

I have several @Entity classes that are used throughout the code.

@Entity
@Table(name = "foo")
public class Foo {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long foo_id;

    @Column(name="my_name")
    private String name;

... (10+ fileds that will likely be changed throughout the development)

}

I need to create a system that will archive this Entity and similar ones (each one in its own table) adding a snapshot time, so the resulting archive table looks somewhat like: