java - 我收到错误 : Invocation of init method failed; nested exception is org. hibernate.MappingException: Repeated column in mapping for entity

Question

我得到错误:init 方法调用失败；嵌套异常是 org.hibernate.MappingException: Repeated column in mapping for entity: com.messagemanager.domain.User column: id (should be mapped with insert="false"update="false")

有我的实体:

@MappedSuperclass
public abstract class BaseEntity{

    @Id
    @Column(nullable = false, unique = true, name = "id", insertable = false, updatable = false)
    @GeneratedValue(strategy= GenerationType.AUTO)
    private Long id;

    public Long getId() {
        return id;
    }   

    public void setId(Long id) {
        this.id = id;
    }
}


@Entity
@Table(name = "User")
public class User  extends BaseEntity implements Serializable{
    @Column(name = UserFieldsKey.ID, length = 50, nullable = false)
    private String name;

    @Column(updatable = false, insertable = false)
    @Transient
    private List<Message> listMessage = new ArrayList<>();

    public static class UserFieldsKey{
        public static final String NAME = "name";
    }

    public User() {
    }

    @OneToMany(fetch = FetchType.EAGER, mappedBy = "user")
    public List<Message> getListMessage() {
        return listMessage;
    }

    public void setListMessage(List<Message> listMessage) {
        this.listMessage = listMessage;
    }


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}


@Entity
@Table(name = "Message")
public class Message extends BaseEntity implements Serializable{
    @Column(name = MessageFieldsKey.MESSAGE, length = 500, nullable = false)
    private String message;

    @ManyToOne(cascade=CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinColumn(name="user")
    private User user;

    @Column(name = "id_user")
    private Long id_user;

    public Long getId_user() {
        return id_user;
    }

    public void setId_user(Long id_user) {
        this.id_user = id_user;
    }

    public static class MessageFieldsKey{
        public static final String MESSAGE = "mes";
    }

    public String getMessage() {
        return message;
    }

    public User getUser() {
        return user;
    }

    public Message() {
    }

    public Message(String message, User user) {
        this.message = message;
        this.user = user;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public void setUser(User user) {
        this.user = user;
    }
}

有什么想法吗？

附言非常感谢!

Answer 1

看起来那是因为你有这个:

@ManyToOne(cascade=CascadeType.ALL, fetch = FetchType.EAGER)
@JoinColumn(name="user")
private User user;

这将映射到 User.id；在 Message 中你已经有了一个 id 因为你正在扩展 BaseEntity