org.hibernate.mappingException：属性映射在枚举实体中的列数错误

Question

CREATE TABLE status (
  code VARCHAR(40),
  status ENUM('not started', 'in progress', 'finished')
);

insert into status (code, status)
values (1, 'not started'),
       (2, 'in progress'),
       (3, 'finished');

CREATE TABLE `explorer` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `create_date` datetime DEFAULT NULL,
  `query` varchar(255) COLLATE utf8mb4_unicode_520_ci DEFAULT NULL,
  `title` varchar(255) COLLATE utf8mb4_unicode_520_ci DEFAULT NULL,
  `status_id` int DEFAULT NULL,
  PRIMARY KEY (`id`),
  FOREIGN KEY (status_id) REFERENCES status(code)
) ENGINE=MyISAM AUTO_INCREMENT=45 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci;

@Entity
@Table(name = "explorer", schema = "parsebeandeveloper", catalog = "")
public class ExplorerEntity {
private long id;
private Timestamp createDate;
private String query;
private String title;
private Integer statusId;

@Id
@Column(name = "id")
public long getId() {
    return id;
}

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

@Basic
@Column(name = "create_date")
public Timestamp getCreateDate() {
    return createDate;
}

public void setCreateDate(Timestamp createDate) {
    this.createDate = createDate;
}

@Basic
@Column(name = "query")
public String getQuery() {
    return query;
}

public void setQuery(String query) {
    this.query = query;
}

@Basic
@Column(name = "title")
public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

@Basic
@Column(name = "status_id")
public Integer getStatusId() {
    return statusId;
}

public void setStatusId(Integer statusId) {
    this.statusId = statusId;
}
}

>

状态：

@Entity
@Table(name = "status", schema = "parsebeandeveloper")
public class StatusEntity {
private Integer code;
private Object status;

@Basic
@Column(name = "code")
public Integer getCode() {
    return code;
}

public void setCode(Integer code) {
    this.code = code;
}

@Basic
@Column(name = "status")
public Object getStatus() {
    return status;
}

public void setStatus(Object status) {
    this.status = status;
}

}

我在控制台得到的是：

  FOREIGN KEY (status_id) REFERENCES status(code)

或在创建类EntityStatus时

在这种情况下，如何正确创建status实体或在表之间创建引用？

Answer 1

Hibernate抱怨它无法映射StatusEntity.Status，因为它被声明为Object类型。

您可以将其更改为string类型，Hibernate应该能够将其映射到数据库枚举类型。

您还可以对status字段使用Java枚举，并让hibernate使用@enumerated注释映射它。