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Re: [eclipselink-users] Exception Description: Missing mapping for field id 
Thanx that was it. Added a @Column(name="id") to the Integer id.
Though what makes me wonder is that I hadn't any problems without the extra column definition so far. 

Best Regards

Mihael


christopher delahunt schrieb:

Hello,
The column name defaults to "ID" not "id". Change your referencedColumnName="ID" or define the column name on the private Integer id to be "id". 

Best Regards,
Chris

Mihael Schmidt wrote:

Hi,
I am new to EclipseLink and JPA and have a problem with a ManyToMany relationship with my entities.
I'm getting the error: Exception Description: Missing mapping for field [public.hr_bewerbungen.id]. 

Tables:

create table hr_ursachen
(
   id serial not null primary key,
   bezeichnung text not null
);

create table hr_bewerbungen
(
   id serial not null primary key,
   bewerberId integer not null,
   stelleId integer not null,
   vorstellungstermin date,
   ergebnis text,
   bemerkung text,
   erfassungsdatum date,
   version timestamp
);

create table hr_herkunft
(
 bewerbungId integer not null,
 ursacheId integer not null,
 primary key(bewerbungId, ursacheId)
);
A "Bewerbung" can have many "Ursache". An "Ursache" can be a part of many "Bewerbung". This is saved in the table hr_herkunft. 


Classes:

@Entity
@Table(name = "hr_bewerbungen", schema="public")
public class Bewerbung
implements Serializable
{
   @Id
   @SequenceGenerator(name="hr_bewerbungen_id_seq", allocationSize=1)
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="hr_bewerbungen_id_seq") 
   private Integer id;

   @ManyToMany
   @JoinTable
   (
        name="hr_herkunft",
        joinColumns=
             @JoinColumn(name="bewerbungId", referencedColumnName="id"),
        inverseJoinColumns=
             @JoinColumn(name="ursacheId", referencedColumnName="id")
   )
   private List<Ursache> ursachen = new ArrayList<Ursache>();

   ...
}

@Entity
@Table(name = "hr_ursachen", schema="public")
public class Ursache
implements Serializable
{
   @Id
   private Integer id;
     ...
}
I need the information which "Ursache" a "Bewerbung" has. The other way round is not important. 

Any idea what I am doing wrong?

Thanx in advance.

Mihael
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