Hibernate - Spring - ConstraintViolationException - UniqueConstraint

如何解决Hibernate - Spring - ConstraintViolationException - UniqueConstraint

我正在尝试为我的 Profile 模型制作一些装置，但是每次我在更新后尝试“再次”保存它时，我都会收到以下消息： nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute statement

这是我的个人资料类：

@Entity
@Data
@Builder
@ToString(of = {"birthday","discordId","description","spokenLanguages"})
@NoArgsConstructor
@AllArgsConstructor
@Table(name = "profile",uniqueConstraints = @UniqueConstraint(columnNames = "discordId"))
public class Profile implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int idProfile;
    private Date birthday;  
    @Column(name="discordId",insertable=true,updatable=false)
    private String discordId;
    private String description;

    @ElementCollection(fetch = FetchType.EAGER)
    private Set<String> spokenLanguages = new LinkedHashSet<String>();

    @JsonIgnore
    @OnetoMany(fetch = FetchType.EAGER)
    private Set<ProfileGame> profileGames = new LinkedHashSet<>();

    @OnetoOne(mappedBy = "profile",cascade = CascadeType.ALL,fetch = FetchType.LAZY,optional = false)
    private User user;

    @ManyToOne
    private TimeSlot timeSlot;

}

这是电话：

@Order(7)
    @Test
    void fillProfileGame() {
        List<Profile> profileList = this.profileRepository.findAll();
        for (Profile profile : profileList) {           
            List<Game> gameList = this.gameRepository.findAll();
            Collections.shuffle(gameList);
            int rndNbGame = new Random().ints(1,5).findFirst().getAsInt();
            for (int i = 1; i <= rndNbGame; i++) {
                int rndLevel = new Random().ints(1,100).findFirst().getAsInt();
                int rndRanking = new Random().ints(1,3000).findFirst().getAsInt();             
                Game rndGame = gameList.get(0);
                gameList.remove(0);
                ProfileGame profileGames = new ProfileGame(profile,rndGame,"level-" + rndLevel,"ranking-" + rndRanking);
                this.profileGameRepository.save(profileGames);
                this.gameRepository.save(rndGame);
            }       
            this.profileRepository.save(profile);
        }       
    }

所以我的理解是 Hibernate 不会让我更新这个对象，因为它有一个唯一的约束字段？

当我们想要一个字段是唯一的并且仍然能够更新其他字段时，我们如何进行？

解决方法

从代码片段中，我看到在列“discordId”上应用了一些独特的约束。

@Table(name = "profile",uniqueConstraints = @UniqueConstraint(columnNames = "discordId"))

和

@Column(name="discordId",insertable=true,updatable=false)
private String discordId;

如您所见，有一个参数 'updatable' 设置为 false。因此，当您尝试更新已经存在的对象时，hibernate 会抛出 UniqueConstraintViolationException。

要解决此问题，请设置 'updatable=true' 或将其完全删除，它应该可以正常工作。

@Column(name="discordId",updatable=true)
private String discordId;