How can I include references in spring rest response?

Question

I have defined two JPARepository with spring: "Person" and "Address". I also specified a relation between Person and Address.

I can fetch all persons with: http://localhost:8080/person/

and all address with: http://localhost:8080/address/

Also I can get the address of a single person with http://localhost:8080/person/1/address

Now I'd like to get the address to every person as a nested address when I get request: http://localhost:8080/person/

How can I include the relations in the response?

My classes as requested by @nicolasl

@Entity
public class Person {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    private String firstName;
    private String lastName;

    @OneToOne
    @JoinColumn(name = "address_id")
    private Address address;


    //Getter/Setter here


}

@Entity
public class Address {

    @Id
    @GeneratedValue
    private long id;

    @Column(nullable = false)
    private String location;

    @OneToOne(mappedBy = "address")
    private Person person;

    //Getter/Setter here
}

You'll want to look into Spring HATEOAS and Spring Data REST. — chrylis -cautiouslyoptimistic-, Oct 04 '18 at 20:35
Solved the problem using projections: https://stackoverflow.com/questions/38096217/spring-data-rest-how-to-add-embedded-resources-inline — Franken, Oct 05 '18 at 12:28

score 0 · Answer 1 · edited Oct 05 '18 at 04:53

0

Well, I guess you just can't, not using the automated rest engine provided by spring. The rest API will return links to retrieve the related entities in the "_links" section of your JSON response (you can read more about that in http://stateless.co/hal_specification.html). You'd have to call those links to retrieve your Addresses.

Another way to solve this, is implementing your own repository and assembling your own JSON response.

edited Oct 05 '18 at 04:53

SAMUEL

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answered Oct 04 '18 at 19:51

nicolasl

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Done in original post @nicolasl – Franken Oct 04 '18 at 19:54
Updated the answer – nicolasl Oct 04 '18 at 20:29
I can't understand why they didn't implement this option. Retrieving 10 persons (with address) this way will cause 11 http requests and 11 db requests. That's slow as hell – Franken Oct 04 '18 at 20:58

How can I include references in spring rest response?

1 Answers1