Issue
I'm trying to relate two tables
User and Address A user has a single address, an address belongs to only one user. Keys are listed by the ID of an Address so I create my address first and then I create a user and link it with an address id But I can't do it at all, I have the following error in return:
Error creating bean with name 'entityManagerFactory' defined in class path resource [org / springframework / boot / autoconfigure / orm / jpa / HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NullPointerException: Cannot invoke "org.hibernate.mapping.PersistentClass.getTable ()" because "classMapping" is null
i'm totally new to hibernate but i need this project for college so forgive me for the ignorance on the subject
Thats my code:
USER/USUARIO Class:
import org.hibernate.validator.constraints.br.CPF;
import javax.persistence.*;
import javax.validation.constraints.*;
public class Usuario{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@Column
@NotNull
@Size(min = 5,max = 30)
@Pattern(regexp = "^[a-zA-Z\s]*$", message = "Nome inválido! Digite apenas letras e espaçamento") //Permite apenas letras e espaço
private String nome;
@NotNull
@CPF
private String cpf;
@NotNull
@Email
private String email;
@NotNull
@Size(min = 5,max = 12)
private String senha;
private Integer telefone;
@DecimalMin("0")
@DecimalMax("5")
private Double avaliacao;
@NotNull
@OneToOne(cascade = CascadeType.ALL,mappedBy = "id")
private Endereco endereco;
//Atributos para usuários autônomos
private Boolean isAutonomo;
private String categoriaAutonomo;
private Double precoAutonomo;
//Getters and Setters
ADRESS/ENDERECO Class
import javax.persistence.*;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
@Entity
@Table(name = "endereco")
public class Endereco {
@Id
@OneToOne
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@NotNull
@Size(min = 8,max = 8)
private String cep;
@NotNull
private String bairro;
@NotNull
private String logradouro;
@NotNull
private Integer numeroLogradouro;
private String complemento;
@NotNull
@Size(min = 2,max = 2)
private String uf;
@NotNull
private String cidade;
CONTROLLER
import br.com.bandtec.projetocaputeam.dominio.*;
import br.com.bandtec.projetocaputeam.repository.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
import java.util.List;
@RestController
@RequestMapping("/caputeam")
public class CaputeamController {
@Autowired
private UsuariosRepository usuariosRepository;
@Autowired
private EnderecoRepository enderecoRepository;
//--- USERS
@GetMapping("/usuarios")
public ResponseEntity getUsuarios(){
List<Usuario> usuarios = usuariosRepository.findAll();
return !usuarios.isEmpty() ? ResponseEntity.status(200).body(usuarios) :
ResponseEntity.status(204).build();
}
@PostMapping("/cadastrar-usuario")
public ResponseEntity cadastrarUsuario(@RequestBody @Valid Usuario novoUsuario){
usuariosRepository.save(novoUsuario);
return ResponseEntity.ok().build();
}
//--- ADRESS
@PostMapping("/cadastrar-endereco")
public ResponseEntity cadastrarEndereco(@RequestBody @Valid Endereco novoEndereco){
enderecoRepository.save(novoEndereco);
return ResponseEntity.ok().build();
}
}
APPLICATION
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ProjetoCaputeamApplication {
public static void main(String[] args) {
SpringApplication.run(ProjetoCaputeamApplication.class, args);
}
}
EDIT I tried to delete the "mapped by" part and remove the @OneToOne from Address but now it returns the following error when I try to send an POST of Adress:
org.h2.jdbc.JdbcSQLIntegrityConstraintViolationException: Referential integrity constraint violation: "FKMXNOON0IKGA83W1A203Y6OFPN: PUBLIC.ENDERECO FOREIGN KEY(ID) REFERENCES PUBLIC.USUARIO(ID) (1)"; SQL statement:
insert into endereco (bairro, cep, cidade, complemento, logradouro, numero_logradouro, uf, id) values (?, ?, ?, ?, ?, ?, ?, ?) [23506-200]
as if he didn’t enter any Address fields
Im sending my POST by Postman like this:
{
"bairro": "Vila Prmavera",
"cep": "03388110",
"cidade": "São Paulo",
"complemento": "b1",
"logradouro": "Rua das dores",
"numeroLogradouro": 7,
"uf": "SP"
}
Solution
Don't map on the Id. Map means entity mapping not id mapping.
public class Endereco {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@OneToOne
private Usuario usuario
....
}
Or if you don't want Endereco to hold a reference to a Usuario just remove it. But you can't place @OneToOne
on the id field. If you have only on one side the @OneToOne
then you need also the annotation @MapsId
.
public class Usario {
@NotNull
@MapsId
@OneToOne(cascade = CascadeType.ALL)
private Endereco endereco;
public class Endereco {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id
}
Because @OneToOne
tries to Map with an entity which means to a table in Database. For id there isn't any entity or Table in the database. That is why it complains
Answered By - Panagiotis Bougioukos
Answer Checked By - Senaida (JavaFixing Volunteer)