Request Wrapper Body using Spring Boot

Question

I have two entities that represent two tables in the database, similar to the concept of inheritance:

Entity Person:

@Entity
@Table(name ="person", schema = "myself")
public class Person implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="person_id")
    private long id;

    @Column(name = "person_name", nullable = false, length = 255)
    @NotNull(message = "name_expects")
    private String name;

    @OneToOne(mappedBy = "person", cascade = CascadeType.ALL, orphanRemoval = false, fetch = FetchType.LAZY)
    @JsonIgnore
    private AdressPerson adressPerson;

... get and setters
}

Entity Adress:

@Entity
@Table(name ="adress_person", schema = "myself")
public class AdressPerson implements Serializable {

    @Id
    @Column(name = "person_id")
    private long id;

    @Column(name = "type", nullable = false, length = 14)
    private String type;

    @Column(name = "adress", nullable = false, length = 255)
    private String adress;

    @OneToOne(fetch = FetchType.LAZY)
    @MapsId
    private Person person;

... get and setters
}

I need to send a single request post and form-data with this:

{
   "id":1,
   "name":"John Doe",
   "type": "home",
   "adress" : "Madison Ave"
}

In my controller I need to receive this way:

...
@PostMapping(value = "", consumes = {MediaType.APPLICATION_FORM_URLENCODED_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
public AdressPerson addAdressPerson(@NotNull @RequestParam AdressPerson adressPersonRequest)  {
    //code
}
...

However I am not able to do the mapping, I have tried to use filter and RequestWrapper, but I was not able to overwrite the message body. Anyone can help me?

Thanks!

Answer 1

Spring's @RequestParam maps query parameters, like ?name=something&address=some-address

While you're trying to make a POST request and want to deserialize JSON request payload into a java class.

Use @RequestBody instead.

Answer 2

Within your @RestController class you can define your POST mapping method as follows:

...
@PostMapping(value = "")
public AdressPerson addPerson(@RequestBody Person person)  {
       //code
}
...

As a default, your spring-boot project expects / returns a JSON body, so you can omit the consumes and produces attributes.

Now for receiving the payload in above controller, your JSON request body should look like -

{
  "id":1,
  "name":"John Doe",
  adressPerson": {
      "type": "home",
      "adress" : "Madison Ave"
   }
}

Also, within your entity Person, remove @JsonIgnore from adressPerson field, instead try using @JsonManagedReference and @JsonBackReference.