I have 2 Entity classes User and Address
@Entity
class User
{
int id;
String name;
}
@Entity
class Vehicle
{
@OneToOne
User user;
String vehName;
}
I want to declare "user" data member in Vehicle class as primary key..can anyone tell me the solution?
As explained in the documentation :
Finally, you can ask Hibernate to copy the identifier from another associated entity. In the Hibernate jargon, it is known as a foreign generator but the JPA mapping reads better and is encouraged.
@Entity
class MedicalHistory implements Serializable {
@Id @OneToOne
@JoinColumn(name = "person_id")
Person patient;
}
@Entity
public class Person implements Serializable {
@Id @GeneratedValue Integer id;
}
Or alternatively
@Entity
class MedicalHistory implements Serializable {
@Id Integer id;
@MapsId @OneToOne
@JoinColumn(name = "patient_id")
Person patient;
}
@Entity
class Person {
@Id @GeneratedValue Integer id;
}
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