Exception "org.hibernate.PersistentObjectException" in Hibernate

Question

I use in my project Hibernate. And have error when the server start:

org.hibernate.PersistentObjectException: detached entity passed to persist

Following "autorization" code:

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

@Column(name = "login", unique = true, updatable = false)
private String name;

//Important to Hibernate!
@SuppressWarnings("MySQLConfig")
public UsersDataSet() {
}

@SuppressWarnings("MySQLConfig")
public UsersDataSet(long id, String name) {
    this.setId(id);
    this.setName(name);
}

public UsersDataSet(String name) {
    this.setId(-1);
    this.setName(name);
}

Please, explain me, where am I wrong?

Zeus · Accepted Answer · 2016-03-10 17:17:31Z

3

I'm suspecting that you are trying to do session.persist(userData) rather than doing session.saveOrUpdate(..) (will update the data on the detached object) or session.save(..) (Will create a new row). Please try any of these last two depending on what you want.

answered Mar 10, 2016 at 17:17

Zeus

6,6347 gold badges60 silver badges94 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

ilyagorbunov · Accepted Answer · 2016-03-10 14:51:18Z

2

Next line to create id automatically. That's why you have an exception.

@GeneratedValue(strategy = GenerationType.IDENTITY)

JPA strategy generated id automatically when saving essence. But the constructor has written that is necessary to do manually. That's why JPA thinking detached from persistence context.

For fix it you can change direction id or GeneratedValue(strategy = …)

 public UsersDataSet(long id, String name) {
   // this.setId(id);
    this.setName(name);
}

answered Mar 10, 2016 at 14:51

ilyagorbunov

6035 silver badges9 bronze badges

Collectives™ on Stack Overflow

Exception "org.hibernate.PersistentObjectException" in Hibernate

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related