[FIXED] Hibernate JPA Mapping Multiple Entities of the Same Type

Issue

I have a one-to-many relationship with Customer and Address, but I'm not sure how to represent this with JPA. I don't want use @OneToMany for the AddressEntity's in CustomerEntity because I want to avoid wrapping it in a Collection.

I'm wondering what annotation or even other strategies I can use to maintain the relationship where one customer will, for simplicity, always have two addresses. Any suggestions are appreciated!

Address Entity

@Data
@NoArgsConstructor
@Entity(name = "address")
public class AddressEntity
{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @?
    private CustomerEntity customer;
}

Customer Entity

@Data
@NoArgsConstructor
@Entity(name = "customer")
public class CustomerEntity
{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @?
    private AddressEntity shippingAddress;

    @?
    private AddressEntity billingAddress;
}

Solution

For the case when an address can belong different customers.

@Entity
public class AddressEntity
{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

}

@Entity
public class CustomerEntity
{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne
    private AddressEntity shippingAddress;

    @ManyToOne
    private AddressEntity billingAddress;

}

if each customer has unique address, better to store the addresses in the same customer record.

You can create class EmbeddedAddress and use @Embedded and @Embeddable annotations.

Answered By - v.ladynev