Cfrgtkky

First of all, sorry, I cannot explain myself in any better way.

I am programming an example API, I have a POJO (with JPA) called Movie, so in my controller, I want to give it a JSON to insert a Movie.

Movie has a @ManyToOne(optional = false) property, relating another POJO called Genre (idGenre, Name)

I want to give in a JSON not an object with every property but an id, so:

CONTROLLER

@RequestMapping(value = "/sendMovie", method = RequestMethod.POST)

public void setMovie(@RequestBody Movie movie) {

    mRepo.save(movie);

}

Movie

@Entity

public class Movie {



    @Id

    @Column(name = "ID_MOVIE", nullable = false)

    @GeneratedValue(strategy = GenerationType.AUTO)

    private Long idMovie;



    @Column(name = "NAME")

    private String name;



    @Column(name = "SYNOPSIS")

    private String synopsis;



    @Column(name = "POSTER")

    private String poster;



    @Column(name = "DIRECTOR")

    private String director;



    @JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "idGenre")

    @JsonIdentityReference(alwaysAsId = true)

    @ManyToOne(optional = false)

    @JoinColumn(name = "ID_GENRE", referencedColumnName = "ID_GENRE")

    private Genre genre;

JSON I want to use

{

  "name": "MATRIX",

  "idGenre": 3,

  "synopsis": "NEO DOING THINGS",

  "poster": "matrix.jpg",

  "director": "WACHOWSKIS"

 }

Is there possibility to achieve that?

You did put the JsonIdentity... annotations at the wrong place.

You need to put these annotations on your @Genre class:

@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "idGenre")

@JsonIdentityReference(alwaysAsId = true)

public class Genre {

    @Id

    @Column(...)

    private Long idGenre;



    //....

}

and remove these annotations from the property Genre genre in your Movie class.
You also need to tell Jackson with @JsonProperty("idGenre") that you want this property
serialized with name "idGenre".

@ManyToOne(optional = false)

@JoinColumn(name = "ID_GENRE", referencedColumnName = "ID_GENRE")

@JsonProperty("idGenre")

private Genre genre;

Then the JSON output will be something like this:

{

  "name": "MATRIX",

  "synopsis": "NEO DOING THINGS",

  "poster": "matrix.jpg",

  "director": "WACHOWSKIS",

  "idGenre": 3

}