与 hibernate JPA 的一对一

Question

我正在尝试关联两个表

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用户和地址\n一个用户有一个地址，一个地址只属于一个用户。键按地址 ID 列出\n所以我首先创建我的地址，然后创建一个用户并将其与地址 ID 链接\n但我根本无法做到这一点，我收到以下错误：

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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\n

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我对休眠完全陌生，但我需要这个大学项目，所以请原谅我对这个主题的无知

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那是我的代码：

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用户/USUARIO 类别：

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import org.hibernate.validator.constraints.br.CPF;\n\nimport javax.persistence.*;\nimport javax.validation.constraints.*;\n\n\npublic class Usuario{\n\n    @Id\n    @GeneratedValue(strategy = GenerationType.IDENTITY)\n    private Integer id;\n\n    @Column\n    @NotNull\n    @Size(min = 5,max = 30)\n    @Pattern(regexp = "^[a-zA-Z\\s]*$", message = "Nome inv\xc3\xa1lido! Digite apenas letras e espa\xc3\xa7amento") //Permite apenas letras e espa\xc3\xa7o\n    private String nome;\n\n    @NotNull\n    @CPF\n    private String cpf;\n\n    @NotNull\n    @Email\n    private String email;\n\n    @NotNull\n    @Size(min = 5,max = 12)\n    private String senha;\n\n    private Integer telefone;\n\n    @DecimalMin("0")\n    @DecimalMax("5")\n    private Double avaliacao;\n\n    @NotNull\n    @OneToOne(cascade = CascadeType.ALL,mappedBy = "id")\n    private Endereco endereco;\n\n    //Atributos para usu\xc3\xa1rios aut\xc3\xb4nomos\n\n    private Boolean isAutonomo;\n\n    private String categoriaAutonomo;\n\n    private Double precoAutonomo;\n\n//Getters and Setters\n

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地址/ENDERECO 类

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import javax.persistence.*;\nimport javax.validation.constraints.NotNull;\nimport javax.validation.constraints.Size;\n\n@Entity\n@Table(name = "endereco")\npublic class Endereco {\n\n    @Id\n    @OneToOne\n    @GeneratedValue(strategy = GenerationType.AUTO)\n    private Integer id;\n\n    @NotNull\n    @Size(min = 8,max = 8)\n    private String cep;\n\n    @NotNull\n    private String bairro;\n\n    @NotNull\n    private String logradouro;\n\n    @NotNull\n    private Integer numeroLogradouro;\n\n    private String complemento;\n\n    @NotNull\n    @Size(min = 2,max = 2)\n    private String uf;\n\n    @NotNull\n    private String cidade;\n

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控制器

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import br.com.bandtec.projetocaputeam.dominio.*;\nimport br.com.bandtec.projetocaputeam.repository.*;\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.http.ResponseEntity;\nimport org.springframework.web.bind.annotation.*;\n\nimport javax.validation.Valid;\nimport java.util.List;\n\n@RestController\n@RequestMapping("/caputeam")\npublic class CaputeamController {\n\n    @Autowired\n    private UsuariosRepository usuariosRepository;\n\n    @Autowired\n    private EnderecoRepository enderecoRepository;\n\n//--- USERS\n    @GetMapping("/usuarios")\n    public ResponseEntity getUsuarios(){\n        List<Usuario> usuarios = usuariosRepository.findAll();\n        return !usuarios.isEmpty() ? ResponseEntity.status(200).body(usuarios) :\n                                     ResponseEntity.status(204).build();\n    }\n\n    @PostMapping("/cadastrar-usuario")\n    public ResponseEntity cadastrarUsuario(@RequestBody @Valid Usuario novoUsuario){\n        usuariosRepository.save(novoUsuario);\n        return ResponseEntity.ok().build();\n    }\n\n//--- ADRESS\n    @PostMapping("/cadastrar-endereco")\n    public ResponseEntity cadastrarEndereco(@RequestBody @Valid Endereco novoEndereco){\n        enderecoRepository.save(novoEndereco);\n        return ResponseEntity.ok().build();\n    }\n}\n

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应用

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import org.springframework.boot.SpringApplication;\nimport org.springframework.boot.autoconfigure.SpringBootApplication;\n\n@SpringBootApplication\npublic class ProjetoCaputeamApplication {\n\n    public static void main(String[] args) {\n        SpringApplication.run(ProjetoCaputeamApplication.class, args);\n    }\n\n}\n

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这就是我的逻辑模型\n

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编辑\n我尝试删除“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，它会返回以下错误：

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org.h2.jdbc.JdbcSQLIntegrityConstraintViolationException: Referential integrity constraint violation: "FKMXNOON0IKGA83W1A203Y6OFPN: PUBLIC.ENDERECO FOREIGN KEY(ID) REFERENCES PUBLIC.USUARIO(ID) (1)"; SQL statement:\ninsert into endereco (bairro, cep, cidade, complemento, logradouro, numero_logradouro, uf, id) values (?, ?, ?, ?, ?, ?, ?, ?) [23506-200]\n

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就好像他没有\xe2\x80\x99t 输入任何地址字段一样

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我通过邮递员发送我的帖子，如下所示：

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{\n    "bairro": "Vila Prmavera",\n    "cep": "03388110",\n    "cidade": "S\xc3\xa3o Paulo",\n    "complemento": "b1",\n    "logradouro": "Rua das dores",\n    "numeroLogradouro": 7,\n    "uf": "SP"\n}\n

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Answer 1

不要映射到 ID。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

     ....
   }

或者，如果您不希望 Endereco 保留对 Usuario 的引用，只需将其删除即可。但你不能放在@OneToOneid 字段上。如果您只有一侧，那么@OneToOne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

       }

因为@OneToOne尝试与实体映射，这意味着映射到数据库中的表。对于 id，数据库中没有任何实体或表。这就是为什么它抱怨