Question

I’m facing several problems setting up a One to one associations.

Can you help me set up the relationship using annotations for the following table.

Login -> (id, username, password)
Members -> (member_id, name, address)

Here member_id is same as id in login.

Answer 1

Here’s the example that the Hibernate documentation provides:

@Entity
class MedicalHistory implements Serializable {
  @Id Integer id;

  @MapsId @OneToOne
  @JoinColumn(name = "patient_id")
  Person patient;
}

@Entity
class Person {
  @Id @GeneratedValue Integer id;
}

Replace Person with Login, and MedicalHistory with Member, add the fields you need, and you have your answer.