Re: [NEWBIE] OpenJPA Cannot get id field returned

[Jean-Baptiste BRIAUD -- Novlog]

Did you try GenerationType.IDENTITY ?
@GeneratedValue(strategy = GenerationType.IDENTITY)

I think it should work with int but I prefer long instead.

On Sep 8, 2009, at 10:56 , B.L. Zeebub wrote:

Hi

I have attached my entity definition below. This was created over a
pre-existing database. I create the EntityManagerFactory to obtain the
entitymanager (em) as normal and execute the code;

String jpql = "select c from Platform c";
                em.getTransaction().begin();
                entities = (List) em.createQuery(jpql).getResultList();
                em.getTransaction().commit();

I get the list of Platform entities as expected. Looping through the list, getPlatformName() returns the text as expected, but getId() always returns 0

(zero) for all members of the list. Any ideas as to what I've missed.

Regards

@Entity
@Table(name="Platform")
public class Platform implements Serializable {
        private static final long serialVersionUID = 1L;

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

        @Column(name="PlatformName", length=32)
        private String platformName;

        //bi-directional many-to-one association to PEcu
        @OneToMany(mappedBy="platform")
        private Set<PEcu> pecus;

   public Platform() {
   }

        public int getId() {
                //TODO: Remove
                System.out.println("Platform.getId() called - " + this.id);
                return this.id;
        }

        public void setId(int id) {
                this.id = id;
        }

        public String getPlatformName() {
                //TODO: Remove
                System.out.println("Platform.getPlatform() called - " +
this.platformName);
                return this.platformName;
        }

        public void setPlatformName(String platformName) {
                this.platformName = platformName;
        }

        public Set<PEcu> getPecus() {
                return this.pecus;
        }

        public void setPecus(Set<PEcu> pecus) {
                this.pecus = pecus;
        }
        
}
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