hkakutalua

@RestController
@RequestMapping("/api/people")
public class PeopleController {
    ...

    @PatchMapping("{id}")
    public ResponseEntity<Void> updatePerson(@PathVariable("id") long id,
                                             @Valid @RequestBody PersonUpdateDto personUpdateDto) {
        Optional<Person> personOptional = peopleRepository.getById(id);
        if (!personOptional.isPresent()) {

hkakutalua

package com.example.partialupdates.utils;

import org.openapitools.jackson.nullable.JsonNullable;

import java.util.function.Consumer;

public final class JsonNullableUtils {
    private JsonNullableUtils() {}

    public static <T> void changeIfPresent(JsonNullable<T> nullable, Consumer<T> consumer) {

hkakutalua

@RestController
@RequestMapping("/api/people")
public class PeopleController {
    ...

    @PatchMapping("{id}")
    public ResponseEntity<Void> updatePerson(@PathVariable("id") long id,
                                             @Valid @RequestBody PersonUpdateDto personUpdateDto) {
        Optional<Person> personOptional = peopleRepository.getById(id);
        if (!personOptional.isPresent()) {

hkakutalua

package com.example.partialupdates.controllers.dtos;

import org.openapitools.jackson.nullable.JsonNullable;

import javax.validation.constraints.NotNull;
import java.time.OffsetDateTime;

@SuppressWarnings("FieldMayBeFinal")
public class PersonUpdateDto {
    @NotNull

hkakutalua

package com.example.partialupdates.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.openapitools.jackson.nullable.JsonNullableModule;
import org.springframework.context.annotation.Configuration;

import javax.annotation.PostConstruct;

@Configuration
public class JacksonConfiguration {

hkakutalua

Person person = personOptional.get();
if (personUpdateDto.getFirstName() != null) {
    person.setFirstName(personUpdateDto.getFirstName());
}
if (personUpdateDto.getLastName() != null) {
    person.setLastName(personUpdateDto.getLastName());
}
if (personUpdateDto.getBirthday() != null) {
    person.setBirthday(personUpdateDto.getBirthday());
}

hkakutalua

[
    {
        "id": 1,
        "firstName": "Henrick",
        "lastName": "Kakutalua",
        "birthday": "2020-06-02T22:10:16.016+01:00",
        "bio": "Lorem ipsum",
        "imageUrl": "https://image/profile_photo.jpg"
    },
    {

hkakutalua

package com.example.partialupdates.controllers;

import com.example.partialupdates.controllers.dtos.PersonReadDto;
import com.example.partialupdates.controllers.dtos.PersonUpdateDto;
import com.example.partialupdates.domain.Person;
import com.example.partialupdates.repositories.PeopleRepository;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;

hkakutalua

package com.example.partialupdates.controllers.dtos;

import java.time.OffsetDateTime;

public class PersonUpdateDto {
    private String firstName;
    private String lastName;
    private OffsetDateTime birthday;
    private String bio;
    private String imageUrl;

hkakutalua

package com.example.partialupdates.controllers.dtos;

import java.time.OffsetDateTime;

public class PersonReadDto {
    private final long id;
    private final String firstName;
    private final String lastName;
    private final OffsetDateTime birthday;
    private final String bio;