mysql - 如何解决Hibernate "ERROR o.h.e.jdbc.spi.SqlExceptionHelper - Duplicate entry "异常

Question

我已经尝试解决这个问题两天了，但没有任何效果。我将这些实体隐含在双向关系中。

@Entity
@Table( name = "T_user" )
public class T_user implements Serializable {
   @Id
   @GeneratedValue( strategy = GenerationType.IDENTITY )
   private Long               id_user;

   @OneToOne( targetEntity = T_infosProfile.class, mappedBy = "user", fetch = FetchType.LAZY, orphanRemoval = true )
   private T_infosProfile     infosProfile;

   public void setInfosProfile( T_infosProfile infosProfile ) {
    this.infosProfile = infosProfile;
   }
}

还有

@Entity
@Table( name = "T_infosProfile" )
public class T_infosProfile {

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

   @OneToOne( targetEntity = T_user.class, fetch = FetchType.LAZY )
   @JoinColumn( name = "id_user", unique = true, nullable = false )
   private T_user user;

     @Column( name = "pourcentage_completion", length = 3, updatable = true, unique = false )
     private Integer    pourcentageCompletion;

     @Column( name = "infos_identite", nullable = false, updatable = true, length = 1, columnDefinition = "TINYINT(1)" )
     private Boolean    infosIdentiteCompleted;

     @Column( name = "infos_coordonnees", nullable = false, updatable = true, length = 1, columnDefinition = "TINYINT(1)" )
     private Boolean    infosCoordonneesCompleted;

     @Column( name = "infos_bancaires", nullable = false, updatable = true, length = 1, columnDefinition = "TINYINT(1)" )
     private Boolean    infosBancaireCompleted;

     @Column( name = "infos_chicowa", nullable = false, updatable = true, length = 1, columnDefinition = "TINYINT(1)" )
     private Boolean    infosCompleted;

   //the setter method
   public void setUser( T_user user) {
      this.user = user;
      this.infosIdentiteCompleted = true;
      this.pourcentageCompletion = 0;
      this.infosCoordonneesCompleted = this.user.getInfosCoordonnees() == null ? false : true;
      this.infosBancaireCompleted = this.user.getInfosBancaire() == null ? false : true;
      this.infosCompleted = this.user.getInfosCompleted() == null ? false : true;

      if ( this.infosCoordonneesCompleted == true ) {
        this.pourcentageCompletion = 50;
    }
      if ( this.infosBancaireCompleted == true && this.pourcentageCompletion == 50 ) {
        this.pourcentageCompletion = 75;
    }
      if ( this.infosChicowaCompleted == true && this.pourcentageCompletion == 75 ) {
        this.pourcentageCompletion = 100;
    }
  }
}

我还有这个方法，用于更新用户的 infosProfile :

@Service
public class UIServiceImpl implements UIService {

  @Autowired
  private TinfosProfileRepository   infosProfileRepository;

  @Override
  public T_infosProfile saveInfosPorfile( T_user connectedUser ){
    T_infosProfile infosProfile = connectedUser.getInfosProfile();
    infosProfile.setUser( connectedUser );
    connectedUser.setInfosProfile( infosProfile );
    try {
        return infosProfileRepository.save( infosProfile );
    } catch ( Exception e ) {
        throw new ExceptionsDAO( e.getMessage() );
    }
}

但是当我调用这个方法时，它适用于一种情况，但对于另一种情况，我得到了这个异常:

10-04-2017 16:27:43 [http-nio-8080-exec-3] WARN  o.h.e.jdbc.spi.SqlExceptionHelper - SQL Error: 1062, SQLState: 23000
10-04-2017 16:27:43 [http-nio-8080-exec-3] ERROR  o.h.e.jdbc.spi.SqlExceptionHelper - Duplicate entry '8' for key 'UK_bkariaocmnn2rlh477hvoqkyf'

我只想更新当前用户的 infosProfile 属性。它工作正常的情况是，仅更新一个 infosProfile 的属性，但当我同时更新 2 个属性并尝试 saveInfosProfile() 时，会引发异常。

请帮忙。

Answer 1

查看错误消息，它是不言自明的，因为它表示值 8 已存在于该列中。由于您在该特定列上定义了 UNIQUE CONSTRAINT ，因此它会抛出该错误

Duplicate entry '8' for key 'UK_bkariaocmnn2rlh477hvoqkyf'

其他:查看您的约束名称UK_bkariaocmnn2rlh477hvoqkyf。这就是当您在创建约束时未命名约束时会发生的情况。