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 at http://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.
