Hi
I am new in the list, in these days i am trying save data between two
entity beans using JPA but without success, i am cheking the log nd
says:
Uncaught exception from servlet
javax.persistence.PersistenceException: Error in meta-data for
beans.distritos.id: Cannot have a java.lang.Long primary key and be a
child object (owning field is beans.evento.distrito).
this is my servlet:
Long id =
Long.parseLong(request.getParameter("idDistrito"));
response.setContentType("text/html");
EntityManager cn = emf.get().createEntityManager();
Query q = cn.createQuery("SELECT d FROM distritos d WHERE
d.id = :codigo");
q.setParameter("codigo",id);
distritos dist = (distritos) q.getSingleResult();
EntityManager cn2 = emf.get().createEntityManager();
cn2.getTransaction().begin();
evento e = new evento();
e.setDistrito(dist);
Date fecha = new Date();
e.setFechaCreacion(fecha);
try{
cn2.persist(e);
response.getWriter().write("ok");
}finally{
cn2.getTransaction().commit();
cn2.close();
}
this is my entity bean
Evento:
@Entity
public class evento implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@Temporal(javax.persistence.TemporalType.DATE)
private Date fechaCreacion;
@JoinColumn
@OneToMany(cascade = CascadeType.ALL)
private distritos distrito;
--getter and setter--
Distrito:
@Entity
public class distritos implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
private String distrito;
--getter and setter--
i hope anyone help me, Thank!
Johan
--
You received this message because you are subscribed to the Google Groups
"Google App Engine for Java" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
