Update:
Digging into the source code for
org.datanucleus.store.appengine.query.DatastoreQuery.getSortProperty
allowed me to figure out what was causing the problem. In the follow code,
the emboldened on is the one that threw the exception, it will be noticed
that I have ordered by 'keyx' which is my parameter name and NOT the name or
my attribute in the class JDOTrack, changing it to a proper attribute name
works as expected. NB This was not a problem with Datanucleus and the rdbms
persistence manager there.
Query q = pm.newQuery(JDOTrack.class);
q.setFilter("key == keyx ");
q.declareParameters("String keyx");
q.setUnique(true);
* q.setOrdering("keyx ascending");*
res = (JDOTrack) q.execute(key);
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