休眠：鍵'重複'的重複條目'173-604'

Question

我使用的是Java8，Hibernate 5.2.1.Final，JPA2，Spring 4.3.1.RELEASE和MySQL。

我有一種情況，我在一行上做了select，但得到了ConstraintViolationException。

首先，我有下表。如果我做了選擇通過MySQL工作臺，它有一行數據：

SELECT * FROM www.person; 

結果

ID,    UID,     JOINING_DATE, LASTACCESS_DATE, DISPLAY_NAME, EMAIL_ADDRESS, AVATAR, PROVIDER 
'176', 'PHblCtu5odMNQEaOu9TOmGgpsJM2', '1485981515384', '1485981525475', 'One',  'one@mail.com', null,  '1' 

然後，我的代碼有以下幾點：

的Java

@Override 
public Person findByUid(String uid, Integer provider) { 
    StringBuilder sb = new StringBuilder(); 
    sb.append(" select e.* "); 
    sb.append(" from "); 
    sb.append(" www.person as e "); 
    sb.append(" where e.uid = :uid "); 
    sb.append(" and e.provider = :provider "); 
    Query q = entityManager.createNativeQuery(sb.toString(), Person.class); 
    q.setParameter("uid", uid); 
    q.setParameter("provider", provider); 
    Person person = (Person) q.getResultList().stream().findFirst().orElse(new Person()); 
    return person; 
} 

其他e uid（PHblCtu5odMNQEaOu9TOmGgpsJM2）和提供者（1）匹配上面的行。

但上述q.getResultList()被調用時，我得到：

錯誤

22:28:25,843 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-14) SQL Error: 1062, SQLState: 23000 
22:28:25,844 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-14) Duplicate entry '173-604' for key 'PRIMARY' 
22:28:25,845 INFO [org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl] (default task-14) HHH000010: On release of batch it still contained JDBC statements 
org.hibernate.exception.ConstraintViolationException: could not execute statement 

豆

@Entity 
@Table(name = "person") 
@XmlRootElement(name = "person") 
public class Person extends AbstractDomain<Long> { 

    // private static final Logger logger = Logger.getLogger(
    // ClassName.class.getName()); 

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

    @Size(min = 1, max = 45) 
    @Column(name = "UID") 
    private String uid; 

    @Column(name = "JOINING_DATE", nullable = false) 
    private Long joiningDate; 

    @Column(name = "LASTACCESS_DATE", nullable = false) 
    private Long lastAccessDate; 

    @Size(min = 1, max = 85) 
    @Column(name = "DISPLAY_NAME", nullable = false) 
    private String displayName; 

    @Size(min = 5, max = 55) 
    @Column(name = "EMAIL_ADDRESS", nullable = false, unique = true) 
    private String emailAddress; 

    @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER) 
    @JoinTable(name = "person_language", joinColumns = { 
      @JoinColumn(name = "PER_ID", referencedColumnName = "ID") }, inverseJoinColumns = { 
        @JoinColumn(name = "LANG_ID", referencedColumnName = "LANGUAGE_CODE", unique = true) }) 
    private Set<Language> languages; 

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true) 
    @JoinTable(name = "person_location", joinColumns = { 
      @JoinColumn(name = "PER_ID", referencedColumnName = "ID") }, inverseJoinColumns = { 
        @JoinColumn(name = "LOC_ID", referencedColumnName = "ID", unique = true) }) 
    private Set<LocationPerson> locations = null; 

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER) 
    @JoinTable(name = "person_job_favourites", joinColumns = { 
      @JoinColumn(name = "PER_ID", referencedColumnName = "ID") }, inverseJoinColumns = { 
        @JoinColumn(name = "JOB_ID", referencedColumnName = "ID", unique = true) }) 
    private Set<Job> favouriteJobs; 

問題

我不知道你可以從執行select查詢得到ConstraintViolationException。如果任何人可以建議我如何解決這個問題，我將不勝感激。

p.s.我可以在上面的Bean上成功執行merge。

Answer 1

找到了解決辦法：

我需要設置每個在合併方法聯接的列的：

  person.setLanguages(foundPerson.getLanguages()); 
      person.setLocations(foundPerson.getLocations()); 
      person.setFavoriuteJobs(foundPerson.getFavoriuteJobs());