[google-appengine] Inheritance newbie question
Hi all, I'm new to this and trying to make inheritance work. Looking at the documentation (http://code.google.com/appengine/docs/java/datastore/ dataclasses.html#Inheritance) I see that I can not use new-table for an object that is not at the root of the inheritance hierarchy. So I'm trying this: @Inheritance(strategy = InheritanceStrategy.NEW_TABLE) on User, an object that is at the root of the hierarchy, and I'm leaving the object extending it, Publisher without an inheritance strategy. I'm getting the following: org.datanucleus.store.appengine.DatastoreManager $UnsupportedInheritanceStrategyException: Found inheritance strategy 'superclass-table' on com.myapp.model.Publisher. Like I said, there is no inheritance strategy on Publisher, so I assume the framework is adding the superclass-table on its own. What should I do? How should go about it? The documentation gives an example for and abstract class at the root, but for my app I need User to be stored in it's own table, and only some Users are Publishers, so there would also be a Publisher table. I'll greatly appreciate your help. Thanks, Eyal -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[google-appengine] Inheritance question
Hi all, I'm new to this and trying to make inheritance work. Looking at the documentation (http://code.google.com/appengine/docs/java/datastore/ dataclasses.html#Inheritance) I see that I can not use new-table for an object that is not at the root of the inheritance hierarchy. Fine. I'm trying this: @Inheritance(strategy = InheritanceStrategy.NEW_TABLE) on User, an object that IS AT THE ROOT of the hierarchy, and I'm leaving the object extending it, Publisher without an inheritance strategy. I'm getting the following: org.datanucleus.store.appengine.DatastoreManager $UnsupportedInheritanceStrategyException: Found inheritance strategy 'superclass-table' on com.myapp.model.Publisher. Like I said, there is no inheritance strategy on Publisher, so I assume the framework is adding the superclass-table on its own. What should I do? How should go about it? The documentation gives an example for and abstract class at the root, but for my app I need User to be stored in it's own table, and only some Users are Publishers, so there would also be a Publisher table. I'll greatly appreciate your help. Thanks, Eyal -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[google-appengine] Inheritance
Hi ! I have a problem with inheritance, at persist in the datastore.
When persist a child class, the
error is:
We have not found the Meta-Data/annotations for the class
model.RegFechaUsuario.
Please verify that it has put it in a file correct and valid XML
The configuration in the link :
http://code.google.com/intl/es/appengine/docs/java/datastore/relation...,
does not say anything on inheritance.
Since the xmls would be formed?
Could someone make persist classes that use inheritance?
The code:
The parent class:
public class Fecha implements Serializable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private String nombre;
@Persistent
private Date fechaIni;
@Persistent
private Date fechaFin;
@Persistent(defaultFetchGroup = true)
ListPartido partidos;
private Long id2;
private Long kind;
public Fecha(String nombre, Date fechaIni, Date fechaFin) {
//super();
this.nombre = nombre;
this.fechaIni = fechaIni;
this.fechaFin = fechaFin;
this.setPartidos(new ArrayListPartido());
}
---
The child class:
@PersistenceCapable(identityType =
IdentityType.APPLICATION,detachable=true)
@Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
public class RegFechaUsuario extends Fecha implements Serializable {
@Persistent
private int puntos;
@Persistent
private Long idUsuarioFecha;
@Persistent
private Long idFechaOriginal;
The register of the class RegFechaUsuario:
public RegFechaUsuario crearFechaParaRegistro(Long idUsuario, Fecha
fechaOriginal,Fecha nuevaFecha) {
ControladorTorneo cGT = new ControladorTorneo();
RegFechaUsuario regFechaUsuario = new
RegFechaUsuario(0,
idUsuario,
fechaOriginal.getId2(),nuevaFecha);
cGT.crearRegFechaUsuario(regFechaUsuario);
return regFechaUsuario;
}
The builder of the child class:
public RegFechaUsuario(int puntos, Long idUsuarioFecha,
Long idFechaOriginal, Fecha fechaRegUsuario) {
super(fechaRegUsuario.getNombre(),
fechaRegUsuario.getFechaIni(),
fechaRegUsuario.getFechaFin());
this.setPuntos(puntos);
this.setIdUsuarioFecha(idUsuarioFecha);
this.setIdFechaOriginal(idFechaOriginal);
}
Save the register in the datastore:
public void crearRegFechaUsuario(RegFechaUsuario regFechaUsuario) {
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistentAll(regFechaUsuario);
//Here is the exception, in makePersistent
tx.commit();
} finally {
// pm.close();
if (tx.isActive()) {
tx.rollback();
}
}
}
Regards
Lisandro
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Re: [google-appengine] Inheritance
hi you may upload your videos on http://pmedia4u.com its free and provide you a 1GB limits On Sat, Sep 4, 2010 at 9:06 PM, lisandro lisandr...@gmail.com wrote: Hi! Someone has some code working correctly that uses inheritance? Example? Since in the link: http://code.google.com/intl/es/appengine/docs/java/datastore/relation... He does not say anything in the matter... Regards Lisandro -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.comgoogle-appengine%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
Re: [google-appengine] Inheritance
He dick head, enough already. Somebody please filter this jerk off the list please. On Sun, Sep 5, 2010 at 10:52 PM, Ehsan- ul-haq iehsa...@gmail.com wrote: hi you may upload your videos on http://pmedia4u.com its free and provide you a 1GB limits On Sat, Sep 4, 2010 at 9:06 PM, lisandro lisandr...@gmail.com wrote: Hi! Someone has some code working correctly that uses inheritance? Example? Since in the link: http://code.google.com/intl/es/appengine/docs/java/datastore/relation... He does not say anything in the matter... Regards Lisandro -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.comgoogle-appengine%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.comgoogle-appengine%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en. -- -- Jeff -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[google-appengine] Inheritance
Hi! Someone has some code working correctly that uses inheritance? Example? Since in the link: http://code.google.com/intl/es/appengine/docs/java/datastore/relation... He does not say anything in the matter... Regards Lisandro -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
Re: [google-appengine] Inheritance
What do you mean inheritance? Your link is broke. Robert On Sat, Sep 4, 2010 at 12:06, lisandro lisandr...@gmail.com wrote: Hi! Someone has some code working correctly that uses inheritance? Example? Since in the link: http://code.google.com/intl/es/appengine/docs/java/datastore/relation... He does not say anything in the matter... Regards Lisandro -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
