Have you seen datanucleus-appengine issue 28 (Cannot add child to
existing one-to-many if parent has Long or unencoded String pk)? Might
this issue relate to your problem?
I encountered this in the past and had to change the data type of the
child persistent entity primary key to work around this
Hi! I have tried delete my local_db and the problem persist.
The exception is in the next code, in the call of the build method
"RegFechaUsuario":
ControladorFecha cF = new ControladorFecha();
System.out.println("nombre " + nuevaFecha.getNombre());
System.out.printl
Hi Lisandro,
Perhaps you didn't understand my last line of reasoning re: is your
datastore empty...
I suspect that the schema for your classes has migrated - i.e. a member that
was Long and is now String or vice-versa
A close read of the datastore docs says:
http://code.google.com/appengine/docs/j
Hi! Andy I can't change the type of a member from String to Long
becasue
it is an internal error of datanucleus in google apps, I I do not find
way of solving it.
All the exception is:
Problem accessing /Prode/JugarFecha.action. Reason:
java.lang.Long cannot be cast to java.lang.String
Cause
Yes Fernando, but if I delete the @PrimaryKey in RegFechaUsuario,
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
The child class
you don't need an aditional key
your problem is that you already have a @PrimaryKey in Fecha so you don't
need it in RegFechaUsuario.
Cheers,
Fernando
On Thu, Sep 23, 2010 at 8:30 PM, lisandrodc wrote:
> Hi!Cyrille I add a primary key in my child class:
>
> @PersistenceCapable(identityType =
>
Sorry, I did not see that your child class was inherited from another class.
I tried using inheritance with JDO some times ago.
Unsuccessfully : this is not supported by JDO yet.
See
http://code.google.com/intl/fr-FR/appengine/docs/java/datastore/dataclasses.
html#Inheritance
On 24/09/10 01:3
Hi!Cyrille I add a primary key in my child class:
@PersistenceCapable(identityType =
IdentityType.APPLICATION,detachable="true")
public class RegFechaUsuario extends Fecha {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Pers
There is no primary key in your child class.
Add one.
On 23/09/10 04:40, "lisandrodc" wrote:
> Hi ! I have a problem when persist a chid class.
> The parent class:
>
> @PersistenceCapable
>
> @Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
> public abstract class Fecha {
>
> @P
Hi ! I have a problem when persist a chid class.
The parent class:
@PersistenceCapable
@Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
public abstract class Fecha {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
Hi, Cyrille but I have at the link for inheritance:
http://code.google.com/intl/en/appengine/docs/java/datastore/relationships.html#Polymorphic_Relationships
And I respect this. But I don´t understand since
It me does not work in the mistake that I present in the first post,
when instance the field
Be aware that inheritance is not supported by GAE yet.
The problem might come from this issue.
See :
http://code.google.com/intl/fr-FR/appengine/docs/java/datastore/dataclasses.
html
cyrille
On 19/09/10 18:55, "lisandrodc" wrote:
> Thanks dushyant , but the exception is of an error of JDO,data
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
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