Thanks dushyant , but the exception is of an error of JDO,datanucleus (seemingly). That it has to see with the keys it seems to me, is not the problem that I from my code can use "Long.parseLong(String) to parse". This is something internal that that should do datanucleus. Regards. Lisandro
On 19 sep, 12:19, dushyant bing <[email protected]> wrote: > java.lang.ClassCastException: java.lang.Long cannot be cast to > java.lang.String > > use Long.parseLong(String) to parse > > Sent from my iPad > > On Sep 19, 2010, at 7:52 PM, lisandrodc <[email protected]> wrote: > > Hi! I have a problem with persist a child class. > The classes are: > > The parent class: > > @PersistenceCapable > > @Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE) > public abstract class Fecha { > > @PrimaryKey > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) > private Key id; > @Persistent > private String nombre; > @Persistent > private Date > @Persistent > private Date fechaFin; > > @Persistent(defaultFetchGroup = "true") > List<Partido> partidos; > > The child class: > > @PersistenceCapable > > public class RegFechaUsuario extends Fecha { > > @Persistent > private int puntos; > @Persistent > private Long idUsuarioFecha; > @Persistent > private Long idFechaOriginal; > > And the code of run the exception is: > Transaction tx = pm.currentTransaction(); > try { > tx.begin(); > > pm.makePersistentAll(regFechaUsuario); > //here is the exception > tx.commit(); > > And the regFechaUsuario is created with the build: > > public RegFechaUsuario(String nombre, Date fechaIni, Date fechaFin, > Long idUsuarioFecha, Long idFechaOriginal, List<Partido>partidos) > { > //super(nombre,fechaIni,fechaFin,partidos); > this.puntos = 0; > this.idUsuarioFecha = idUsuarioFecha; > this.idFechaOriginal = idFechaOriginal; > this.partidos=partidos; > > } > > The exception is: > Problem accessing /Prode/JugarFecha.action. Reason: > > java.lang.Long cannot be cast to java.lang.String > > Caused by: > > java.lang.ClassCastException: java.lang.Long cannot be cast to > java.lang.String > at > org.datanucleus.store.appengine.DatastoreRelationFieldManager.checkForParentSwitch(DatastoreRelationFieldManager.java: > 202) > at org.datanucleus.store.appengine.DatastoreRelationFieldManager > $1.setObjectViaMapping(DatastoreRelationFieldManager.java:133) > at org.datanucleus.store.appengine.DatastoreRelationFieldManager > $1.apply(DatastoreRelationFieldManager.java:112) > at > org.datanucleus.store.appengine.DatastoreRelationFieldManager.storeRelations(DatastoreRelationFieldManager.java: > 81) > at > org.datanucleus.store.appengine.DatastoreFieldManager.storeRelations(DatastoreFieldManager.java: > 955) > at > org.datanucleus.store.appengine.DatastorePersistenceHandler.storeRelations(DatastorePersistenceHandler.java: > 546) > at org.datanucleus.store.appengine.DatastorePersistenceHandler. > > Regards > Lisandro > > -- > 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 > athttp://groups.google.com/group/google-appengine-java?hl=en. -- 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.
