I want make shared primary key in Spring data jpa, everything is fine untill i`m using @ManyToOne whats wrong?

my entities:

@Entity
@EqualsAndHashCode
@NoArgsConstructor
@AllArgsConstructor
public class Person {

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

private String name;

@OneToOne(mappedBy = "person", cascade = CascadeType.ALL)
private IDCard idCard;

}

@Entity
@EqualsAndHashCode
@NoArgsConstructor
@AllArgsConstructor
public class IDCard {


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

@OneToOne(cascade = CascadeType.ALL)
private Person person;

private Long inn;

@JsonIgnore
public Person getPerson() {
    return person;
}
}

result (if i`m using @OneToOne it works):

@OneToOne result

when im switching @OneToMany theres diffrent id: @ManyToOne result

CodePudding user response：

Considering only the mapping of the association, the fields should look something like:

@Entity
public class Person {

    // This field is optional, it's useful only if you want a bidirectional association
    @OneToMany(mappedBy = "person", cascade = CascadeType.ALL)
    private List<IDCard> idCards;

}

@Entity
public class IDCard {

    @ManyToOne
    private Person person;
  

}

Please, check many-to-one mapping in the Hibernate ORM guide for more details.