CODEWITHSUNDEEP
springhibernatejpa
amjad
amjad

Reputation: 2916

how to insert/update an entity attribute that is annotated as @CreationTimestamp?

    @Entity
    @Table(name="transactions")
    @NamedQuery(name="Transaction.findAll", query="SELECT t FROM Transaction t")
    public class Transaction implements Serializable{
        private static final long serialVersionUID = 1L;

        @Id
        @GeneratedValue(strategy=GenerationType.IDENTITY)
        @Column(name="id", nullable=false, unique=true, length=11)
        private int id;


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

I have above entity using with Hibernate. I have a requirement where I need to update createdAt field but when I try following it didn't work. The createdAt is from the date of creations, which make sense.

Transaction newTransaction = new Transaction();
newTransaction.setCreatedAT(new Date);    
sessionFactory.openSession().save(newTransaction);

Is there a way to keep @CreationTimestamp annotation and be able to modify or set another date when needed ?

**I am using Hibernate 4 with Spring. Any solution or another suggestion will be highly appreciated **

Upvotes: 1

Views: 873

Answers (1)

Vaelyr
Vaelyr

Reputation: 3176

Why would you want to set it manually? Much cleaner solution would be to have 2 methods in your entity class. Both annotations are from the persistence package.

private Date creationTime;
private Date modificationTime;

@PrePersist
public void prePersist() {
    Date now = Date();
    this.creationTime = now;
    this.modificationTime = now;
}

@PreUpdate
public void preUpdate() {
    this.modificationTime = Date();
}

Or preferably use Java 8/Jodatime classes, in which case you need set @Type for fields manually as Hibernate doesn't support them out of the box as far as I know.

Upvotes: 4

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