[FIXED] What is the correct data type for JpaRepository that has Primary Key but it is also a Foreign Key?

Issue

I have the following tables,

User
int id PK

Contact
int id PK, FK to User.id

So my code in Contact.java is as follows,

@Getter(value = AccessLevel.NONE)
@Setter(value = AccessLevel.NONE)
@Id
@Column(name = "id", insertable = false, updatable = false)
private Integer id;

@OneToOne(fetch = FetchType.LAZY)
@MapsId
@JoinColumn(name = "id", nullable = false)
private User userId;

In my User.java it has,

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;

So according to the above code, I have some questions.

1. Is that the correct approach to indicate that id(primary key) of Contact is also a foreign key to User?

2. And do I need to use @PrimaryKeyJoinColumn or @JoinColumn?

3. According to the above code how my repository interface should be?

    public interface ContactRepository extends JpaRepository<Contact, User> {}
   

   or

    public interface ContactRepository extends JpaRepository<Contact, Integer> {}
   

Solution

1. Don't use foreign key as primary key, if use can
2. JoinColumn
3. Contract has Integer id, so <Contact, Integer>

Answered By - Micah