Hi,
I have a list of Key and i want to get Entity for all these key using
JDO.
Is it possible in JDO? Having a hard time to search through internet
and not finding it.
Tried using pm.getObjectsById(Collection), but it says Object not
found with keys present in the list. I wrote following code for this
PersistenceManager pm =
DbSessionManager.getInstance().startDbSession();
List<Key> keyList = new ArrayList<Key>();
Key oneKey = KeyFactory.createKey("User", 9);
keyList.add(oneKey);
List<User> users = (List<User>)pm.getObjectsById(keyList); (Note:
s after object)
abovce code throws Exception that User(9) not found but it does exists
in datastore and if i do
User users = (User)pm.getObjectById(oneKey);(Note: no s after object)
it returns the User(9)
I also tried using Low level API like this and it works, but only
problem is that it doesnt return its owned properties(see User class
at the end, openIds are not returned and its always null, even though
it does exists).
public Map<Key, Entity> getObjectsById(List<Key> ids) throws
AppException {
DatastoreService ds =
DatastoreServiceFactory.getDatastoreService();
Map<Key, Entity> data = ds.get(ids);
return data;
}
class User{
Key id;
String firstName;
String lastName;
List<OpenId> openIds;
}
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