I have a class named Tabel that has an person. The classes Tabel and Person have a one-to-many relationship.

@Entity
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
@Table(name = "tabel")
public class Tabel {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", nullable = false)
    private Long id;
    private String comments;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "person_id")
    private Person person;

}

@Entity
@Builder
@Data
@NoArgsConstructor
@AllArgsConstructor

public class Person {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String lastname;
    private String surname;

}

There are also DTOs

@Data
@Builder
@EqualsAndHashCode
@Jacksonized
public class TabelDto implements Serializable {
    private Long id;
    private String comments;
    private PersonDto person;
}

@Value
@Builder
public class PersonDto implements Serializable {
    Long id;
    String name;
    String lastname;
    String surname;
}

And my controller

@PostMapping("/addTabel")
public String addTabel(@ModelAttribute TabelDto tabelDto) {
    tabelService.save(tabelDto);
    return "redirect:/addTabel";
}

@GetMapping("/addTabel")
public String addTabel(Model model) {
    TabelDto tabelDto = TabelDto.builder().build();
    model.addAttribute("persons", personService.findAllPerson());
    model.addAttribute("tabelDTO", tabelDto);
    return "addTabel";
}

My HTML Thymeleaf

<form action="#" th:action="@{/tabel/addTabel}" method="post" th:object="${tabelDTO}">
    <label>person:</label>
    <label>
        <select th:field="*{person}" class="form-control">
            <option th:each="person: ${persons}" th:value="${person.id}" th:text="${person.name}"></option>
        </select>
    </label>
    <button type="submit">Register</button>
</form>

When I try to send a POST, I get an error.

[tabel] [nio-8080-exec-2] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.MethodArgumentNotValidException: Validation failed for argument [0] in public java.lang.String by.gus.tabel.controller.TabelController.addTabel(by.gus.tabel.dto.TabelDto): [Field error in object 'tabelDto' on field 'person': rejected value [1]; codes [typeMismatch.tabelDto.person,typeMismatch.person,typeMismatch.by.gus.tabel.dto.PersonDto,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [tabelDto.person,person]; arguments []; default message [person]]; default message [Failed to convert value of type 'java.lang.String' to required type 'by.gus.tabel.dto.PersonDto'; Cannot convert value of type 'java.lang.String' to required type 'by.gus.tabel.dto.PersonDto' for property 'person': no matching editors or conversion strategy found]] ]

But if you put the Table class instead of the TableDTO

public String addTabel(@ModelAttribute Tabel tabelDto)

then everything starts working, but I would like to work through the DTO, and not directly with the entity.

How can I solve this?