[英]OneToOne with hibernate JPA
I'm trying to relate two tables我正在尝试关联两个表
User and Address A user has a single address, an address belongs to only one user.用户和地址 一个用户只有一个地址,一个地址只属于一个用户。 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:
密钥按地址的 ID 列出,因此我首先创建地址,然后创建用户并将其与地址 ID 链接但我根本做不到,我有以下错误作为回报:
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我对 hibernate 完全陌生,但我需要这个项目用于大学,所以请原谅我对这个主题的无知
Thats my code:那是我的代码:
USER/USUARIO Class:用户/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地址/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 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应用
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);
}
}
And thats my Logic Model这就是我的逻辑 Model
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:编辑我试图删除“映射者”部分并从地址中删除@OneToOne,但现在当我尝试发送地址的 POST 时它返回以下错误:
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好像他没有输入任何地址字段
Im sending my POST by Postman like this:我通过 Postman 发送我的 POST,如下所示:
{
"bairro": "Vila Prmavera",
"cep": "03388110",
"cidade": "São Paulo",
"complemento": "b1",
"logradouro": "Rua das dores",
"numeroLogradouro": 7,
"uf": "SP"
}
Don't map on the Id.不要在 ID 上使用 map。 Map means entity mapping not id mapping.
Map 表示实体映射而不是 id 映射。
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.或者,如果您不希望 Endereco 持有对 Usuario 的引用,只需将其删除。 But you can't place
@OneToOne
on the id field.但是您不能将
@OneToOne
放在 id 字段上。 If you have only on one side the @OneToOne
then you need also the annotation @MapsId
.如果您只有一侧有
@OneToOne
,那么您还需要注释@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.因为
@OneToOne
尝试使用表示数据库中表的实体来 Map。 For id there isn't any entity or Table in the database.对于 id,数据库中没有任何实体或表。 That is why it complains
这就是它抱怨的原因
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