Spring Boot : Values of all attributes of DTO are null

Question

I'm developing a Spring Boot application and I have a problem with my POST request. When I do the request it seems that every field in the request body is null.

Client entity

    package com.tradeManagementApp.tradeManagement.model;
    
    import lombok.*;
    
    import javax.persistence.*;
    import java.util.List;
    
    @Data
    @Builder
    @NoArgsConstructor
    @AllArgsConstructor
    @EqualsAndHashCode(callSuper = true)
    @Table(name ="Client")
    @Entity
    public class Client extends AdstractEntity{
    
        @Column(name = "nom")
        private String nom;
    
        @Column(name = "prenom")
        private String prenom;
    
        @Column(name = "photo")
        private String photo;
    
        @Embedded
        private Adresse adresse;
    
        @Column(name = "mail")
        private String mail;
    
        @Column(name = "tel")
        private String tel;
    
        @Column(name = "identreprise")
        private int idEntreprise;
    
        @OneToMany(mappedBy = "client")
        private List<CommandeClient> commandeClients;
    }

Adress entity

    package com.tradeManagementApp.tradeManagement.model;
    
    import lombok.*;
    
    import javax.persistence.Column;
    import javax.persistence.Embeddable;
    import java.io.Serializable;
    
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    @Embeddable
    public class Adresse implements Serializable {
    
    
        @Column(name = "adresee1")
        private  String adresse1;
    
        @Column(name = "adresee2")
        private  String adresse2;
    
        @Column(name = "ville")
        private  String ville;
    
        @Column(name = "pays")
        private  String pays;
    
        @Column(name = "codepostal")
        private  String codepostal;
    }

Client DTO

    
    @Builder
    @Data
    public class ClientDto {
    
        private Integer id;
        private String nom;
        private String prenom;
        private String photo;
        private AdresseDto adresse;
        private String mail;
        private Integer idEntreprise;
        private String tel;
        @JsonIgnore
        private List<CommandeClientDto> commandeClients;
    
        public static ClientDto fromEntity (Client client){
            if (client == null){
    
    //            todo throw an exception
                return null;
            }
    
            return ClientDto.builder()
                    .id(client.getId())
                    .nom(client.getNom())
                    .prenom(client.getPrenom())
                    .photo(client.getPhoto())
                    .adresse(AdresseDto.fromEntity(client.getAdresse()))
                    .mail(client.getMail())
                    .idEntreprise(client.getIdEntreprise())
                    .tel(client.getTel())
                    .build();
        }
    
        public static Client toEntity(ClientDto clientDto){
            if (clientDto == null){
    
    //            todo throw an exception
                return null;
            }
    
            Client client = new Client();
    
            client.setId(clientDto.getId());
            client.setNom(clientDto.getNom());
            client.setPrenom(clientDto.getPrenom());
            client.setPhoto(clientDto.getPhoto());
            client.setMail(clientDto.getMail());
            client.setTel(clientDto.getTel());
            client.setIdEntreprise(clientDto.getIdEntreprise());
            client.setAdresse(AdresseDto.toEntity(clientDto.getAdresse()));
    
            return client;
        }
    
    }

Adress DTO

    
    @AllArgsConstructor
    @NoArgsConstructor
    @Builder
    @Data
    public class AdresseDto {
    
        private  String adresse1;
        private  String adresse2;
        private  String ville;
        private  String pays;
        private  String codePostal;
    
        public static AdresseDto fromEntity(Adresse adresse){
            if (adresse == null){
    
    //            todo throw an exception
                return null;
            }
            return AdresseDto.builder()
                    .adresse1(adresse.getAdresse1())
                    .adresse2(adresse.getAdresse2())
                    .ville(adresse.getVille())
                    .pays(adresse.getPays())
                    .codePostal(adresse.getCodepostal())
                    .build();
        }
    
        public static Adresse toEntity (AdresseDto adresseDto){
            if (adresseDto == null){
    
    //            todo throw an exception
                return null;
            }
    
    
            Adresse adresse = new Adresse();
    
            adresse.setAdresse1(adresseDto.getAdresse1());
            adresse.setAdresse2(adresseDto.getAdresse2());
            adresse.setVille(adresseDto.getVille());
            adresse.setPays(adresseDto.getPays());
            adresse.setCodepostal(adresseDto.getCodePostal());
    
            return adresse;
        }
    }

client validator

    public class ClientValidator {
    
        public static List<String> validate (ClientDto clientDto){
            List<String> errors = new ArrayList<>();
    
            if (clientDto == null){
                errors.add("veuillez renseignez le nom du client");
                errors.add("veuillez renseignez le prenom du client");
                errors.add("veuillez renseignez l'email du client");
                return errors;
            }
            if ( !StringUtils.hasLength(clientDto.getNom())){
                errors.add("veuillez renseignez le nom du client");
            }
            if ( !StringUtils.hasLength(clientDto.getPrenom())){
                errors.add("veuillez renseignez le prenom du client");
            }
            if ( !StringUtils.hasLength(clientDto.getMail())){
                errors.add("veuillez renseignez l'email du client");
            }
            if ( !StringUtils.hasLength(clientDto.getTel())){
                errors.add("veuillez renseignez le numero de telephone du client");
            }
    
            return errors;
        }
    }

Save client method in Service

    @Override
        public ClientDto save(ClientDto clientDto) {
            List<String> errors = ClientValidator.validate(clientDto);
    
            if (!errors.isEmpty()){
                log.error("Client is not Valid {}",clientDto);
                throw new InvalidEntityException("le client est invalide", ErrorCode.CLIENT_NOT_VALID, errors);
            }
            return ClientDto.fromEntity(
                    clientRepositry.save(ClientDto.toEntity(clientDto))
            );
        } 

Client controller

   
        @PostMapping(value = CLIENT_ENDPOIND+"/", consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
        @Operation(summary = "enregistrer un client", description = "cette methode permet de enregistrer un client"
        )
        @ApiResponses(value = {
                @ApiResponse(responseCode = "200", description = "client enregistrer avec succée"),
                @ApiResponse(responseCode = "400", description = "les informations du clients ne sont pas valides")
        })
        ClientDto save(@RequestBody ClientDto clientDto);

When i do a post request using swagger UI

curl -X 'POST' \
  'http://localhost:8080/tradeManagement/v1/clients/' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  
  "nom": "string",
  "prenom": "string",
  "photo": "string",
  "adresse": {
    "adresse1": "string",
    "adresse2": "string",
    "ville": "string",
    "pays": "string",
    "codePostal": "string"
  },
  "mail": "string",
  "idEntreprise": 0,
  "tel": "string"
}'

I have an error stating that the values of all attributes of customer Dto are null.

ERROR 13948 --- [nio-8080-exec-6] c.t.t.s.i.ClientServiceImplementation    : Client is not Valid ClientDto(id=null, nom=null, prenom=null, photo=null, adresse=null, mail=null, idEntreprise=null, tel=null, commandeClients=null)

response body

{
  "httpCode": 400,
  "errorCode": "CLIENT_NOT_VALID",
  "message": "le client est invalide",
  "errors": [
    "veuillez renseignez le nom du client",
    "veuillez renseignez le prenom du client",
    "veuillez renseignez l'email du client",
    "veuillez renseignez le numero de telephone du client"
  ]
}

Answer 1

You may have incorrect import in your controller:

Add:

import org.springframework.web.bind.annotation.RequestBody;

Remove:

import io.swagger.v3.oas.annotations.parameters.RequestBody;