我需要将 JPA 类转换为 MongoDB

问题描述

我正在两个 JPA 类中建立多对多关系以关联用户及其对应的类，我必须使用 MongoDB，但无法进行正确的转换。

我的类 Usuario (JPA) 它包含 getter 和 setter 以及 serialVersionUID，我没有放它们，因为它太长了：

@Entity
@Table(name = "usuarios")
public class Usuario implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(unique = true,length = 20)
    private String username;

    @Column(length = 100)
    private String password;

    private Boolean enabled;

    @Column(unique = true,length = 30)
    private String phone;

    private String nombre;
    private String apellido;

    @Column(unique = true,length = 100)
    private String email;

    private String ubicacion;
    private String intereses;
    private Integer intentos;

    private String llave;

    private String token;

    @ManyToMany(fetch = FetchType.LAZY)
    @JoinTable(name = "usuarios_roles",joinColumns = @JoinColumn(name = "usuario_id"),inverseJoinColumns = @JoinColumn(name = "role_id"),uniqueConstraints = {
            @UniqueConstraint(columnNames = { "usuario_id","role_id" }) })
    private List<Role> roles;

mongodb UsuarioDb 中的对应物（我不知道如何更改@JoinTable 使其在 mongo 中工作相同，它包含 getter 和 setter、toString 和 serialVersionUID，我没有放它们，因为它太长了） :

@Document(collection = "Usuarios")
public class UsuarioDb implements Serializable {

    @Transient
    public static final String SEQUENCE_NAME = "users_sequence";
    
    @Id
    private Long id;

    @Indexed(unique=true)
    private String username;

    private String password;

    private Boolean enabled;

    @Indexed(unique=true)
    private String phone;

    private String nombre;
    private String apellido;

    @Indexed(unique=true)
    private String email;

    private String ubicacion;
    private String intereses;
    private Integer intentos;

    private String llave;

    private String token;

    @DBRef(lazy = true)
    @JoinTable(name = "usuarios_roles","role_id" }) })
    private List<RoleDb> roles;

类角色 (JPA)：

@Entity
@Table(name = "roles")
public class Role implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(unique = true,length = 30)
    private String nombre;

类 RoleDB (MongoDb)：

@Document(collection = "roles")
public class RoleDb implements Serializable {

    @Transient
    public static final String SEQUENCE_NAME = "users_sequence";
    
    @Id
    private Long id;

    @Indexed(unique=true)
    private String nombre;

添加一个类来生成ID：

@Service
public class SequenceGeneratorService {

    private MongoOperations mongoOperations;

    @Autowired
    public SequenceGeneratorService(MongoOperations mongoOperations) {
        this.mongoOperations = mongoOperations;
    }

    public long generateSequence(String seqName) {

        DatabaseSequence counter = mongoOperations.findAndModify(query(where("_id").is(seqName)),new Update().inc("seq",1),options().returnNew(true).upsert(true),DatabaseSequence.class);
        return !Objects.isNull(counter) ? counter.getSeq() : 1;

    }
}

和一个监听器类：

@Component
public class usermodelListener extends AbstractMongoEventListener<UsuarioDb> {

    private SequenceGeneratorService sequenceGenerator;

    @Autowired
    public usermodelListener(SequenceGeneratorService sequenceGenerator) {
        this.sequenceGenerator = sequenceGenerator;
    }

    @Override
    public void onBeforeConvert(BeforeConvertEvent<UsuarioDb> event) {
        if (event.getSource().getId() < 1) {
            event.getSource().setId(sequenceGenerator.generateSequence(UsuarioDb.SEQUENCE_NAME));
        }
    }

}

我需要帮助才能使过渡正确

解决方法

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