This is not the most elegant or efficient way to do things but here is
something to make your code work.
public Torneo devolverTorneo(Long idTorneo) {
Torneo dbTorneo = pm.getObjectById(Torneo.class, idTorneo);
// detach a copy of the persistent object
return pm.detachCopy(dbTorneo );
}
public void agregarEquipoConTorneo(Torneo unTorneo, Equipo
unEquipo) {
Transaction tx = pm.currentTransaction();
try {
tx.begin();
// sync unTorneo with database before changing it
Torneo dbTorneo = pm.makePersistent(unTorneo);
dbTorneo.agregarEquipo(unEquipo);
/*add an "Equipo" to collection "equipos" That has
the class "Torneo"
Debugs adds, but sometimes he does not persist*/
tx.commit();
System.out.println("persistioTorneoConEquipo");
} finally {
if (tx.isActive()) {
tx.rollback();
}
}
}
Another way to do all this is to redesign your ControladorTorneo class to
only store the ID of the Torneo and fetch it from the database in the
transaction you want to change it.
public void agregarEquipoConTorneo( torACargar, Equipo unEquipo)...
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