Thanks Didier, but "@Parent" It is not an annotation of JPA... link: http://www.datanucleus.org/products/accessplatform_1_1/jpa/annotations.html What is what you say that I must place in the code?
Regards Lisandro On 27 feb, 04:06, Didier Durand <[email protected]> wrote: > Yes, > > You can't update 2 entities that are not related by a parent (@Parent) > - child relationship in a single transaction else GAE creates them in > 2 separate entity groups and then throws an exception because a > transaction can't update objects in more than 1 entity group. > > See parag Entity Groups > inhttp://code.google.com/appengine/docs/java/datastore/transactions.html > > regards > > didier > > On Feb 26, 8:49 pm, lisandrodc <[email protected]> wrote: > > > Hi ! I have an error at update an object: > > > public void agregarGrupoConUsuario(Usuario usuario,Long idGrupo) { > > > EntityTransaction et= em.getTransaction(); > > try { > > et.begin(); > > ControladorGrupoTorneo cGT = new > > ControladorGrupoTorneo(); > > GrupoTorneo grTorneo = > > cGT.devolverGrupoTorneo(idGrupo); > > usuario.agregarGrupoTorneo(grTorneo); > > em.merge(usuario); > > et.commit(); > > //the exception at commit; > > System.out.println("persistioUsuarioConGrupo"); > > } finally { > > > The error is: > > > Caused by: java.lang.IllegalArgumentException: can't operate on > > multiple entity groups in a single transaction. found both Element { > > type: "GrupoTorneo" > > id: 3} > > > and Element { > > type: "Usuario" > > id: 11 > > > } > > > Class Usuario: > > > @Entity > > public class Usuario { > > @Id > > @GeneratedValue(strategy = GenerationType.IDENTITY) > > private Key id; > > > private String nombreUsuario; > > > private String nombre; > > > private String apellido; > > > private String telefono; > > > private String password; > > > private String mail; > > > private String imagen; > > > private String ciudad; > > > private String pais; > > @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE, > > CascadeType.REFRESH, CascadeType.MERGE}) > > private List<RegFechaUsuario> listRegFechaUsuario; > > @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.REMOVE, > > CascadeType.REFRESH, CascadeType.MERGE}) > > private List<GrupoTorneo> gruposTorneo; > > /** > > .... > > > Class GrupoTorneo: > > > @Entity > > public class GrupoTorneo { > > @Id > > @GeneratedValue(strategy = GenerationType.IDENTITY) > > private Key id; > > > private String nombre; > > > private String descripcion; > > > private Date fechaCreacion; > > > private Long idTorneo; > > > private Long idUsuarioCreador; > > > private String nombreUsuarioCreador; > > > private Long idGrupo; > > ... > > ... > > > Solution? > > > Regards > > -- 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.
