This sort of question is ideal to be asked on StackOverflow.
On Tuesday, 12 November 2013 03:14:38 UTC, skin wrote:
>
> Hi,
>
> I am getting the below exception even when I have the entity with Id 4 for
> the kind X.
>
> Could not retrieve entity of kind X with key X("X(4)")
> org.datanucleus.exceptions.NucleusObjectNotFoundException: Could not
> retrieve entity of kind X with key X("X(4)")
> at
> com.google.appengine.datanucleus.DatastoreExceptionTranslator.wrapEntityNotFoundException(DatastoreExceptionTranslator.java:61)
> at
> com.google.appengine.datanucleus.EntityUtils.getEntityFromDatastore(EntityUtils.java:670)
> at
> com.google.appengine.datanucleus.DatastorePersistenceHandler.fetchObject(DatastorePersistenceHandler.java:543)
> at
> org.datanucleus.state.JDOStateManager.loadFieldsFromDatastore(JDOStateManager.java:1638)
> at
> org.datanucleus.state.JDOStateManager.validate(JDOStateManager.java:3511)
> at
> org.datanucleus.ObjectManagerImpl.findObject(ObjectManagerImpl.java:3379)
> at
> org.datanucleus.api.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:1722)
> at
> org.datanucleus.api.jdo.JDOPersistenceManager.getObjectById(JDOPersistenceManager.java:1740)
> ...................
>
> Below is the structure of Kind X,
>
> @PersistenceCapable
>
> class X {
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Key xId;
>
> // getter setter for xId and other attributes
> }
>
> I am trying to retrieve this using below code,
>
> getX(String id){
> PersistenceManager pm = PMF.get().getPersistenceManager();
> ...
> Key k = KeyFactory.createKey(X.class.getSimpleName(), id);
> X x = pm.getObjectById(X.class, k);
> //X x = pm.getObjectById(X.class, id); // Even this does not work
> return x;
> ...
> }
>
> I am sure I am doing some silly and basic mistake here. Can someone out
> here figure out as to what am I doing wrong over here ?
>
> Thanks !
>
>
>
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