Question

使用JPA与MySQL交互。代码
ImpsLogEntity类

@Entity
@Table(name = "imps_log")
@Getter
@Setter
public class ImpsLogEntity extends ImpsLog {}

ImpsLog类

   @Setter
   @Getter
   @JsonIgnoreProperties(ignoreUnknown = true)
   @MappedSuperclass
   @ToString
   public class ImpsLog {

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

      @Column(name = "amount")
      private BigDecimal amount;

      @Column(name = "created_at")
      @CreationTimestamp
      private Date createdAt;

      @Column(name = "updated_at")
      @UpdateTimestamp
      private Date updatedAt;

    }

ImpsLogRepo

public interface ImpsLogRepo extends JpaRepository<ImpsLogEntity, Long> {
    }

ImpsLogBo

@Getter
@Setter
public class ImpsLogBo extends ImpsLog {

  private Error error;
}

AccountMapper（使用mapstruct）

@Mapper(componentModel = "spring")
@DecoratedWith(AccountMapperDecorator.class)
public interface AccountMapper {

ImpsLogEntity impsLogBoToImpsLogEntity(final ImpsLogBo impsLogBo);
}

创建和保存对象：

ImpsLogBo impsLogBo = new ImpsLogBo() ;
impsLogBo.setAmount(new Bigdecimal(200));
ImpsLogEntity impsLogEntity = 
this.accountMapper.impsLogBoToImpsLogEntity(impsLogBo);
impsLogEntity = this.impsLogRepo.save(impsLogEntity);

imps_log的SQL create语句

CREATE TABLE `imps_log` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `amount` decimal(15,2) DEFAULT NULL,
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `created_at` (`created_at`),
  KEY `updated_at` (`updated_at`)
)

此代码为 org.hibernate.engine.jdbc.spi.SqlExceptionHelper- 保存到数据库时，“ created_at”列不能为空错误。

*

奇怪的部分，对于此注释，其他实体也是如此。而且对于这个实体，这个错误也不是一致的。

*

@CreationTimestamp和@UpdateTimestamp无法与JPA 2.0.2一起使用

0 个答案: