Yes, to use JDO your going to have to annotate the class and have the
DataNucleus enhancer run over the classes. If you use the low-level API then
you can just query for the Entity object itself.
On Wed, Jan 26, 2011 at 3:09 PM, Marc Herber wrote:
> Thanks for your hint. Meanwhile I debugged the
Thanks for your hint. Meanwhile I debugged the code and found the reason of
the NullPointerException.
The method getObjectById is implemented by the class
DatastoreJDOPersistenceManager. Within this method there is
*EntityUtils.idToInternalKey(getObjectManager(),
cls, key, false);*. This metho
I just talked about GQL because within the Datastore Viewer of my dashboard
I can enter a GQL-query. That's why I was assuming that "everybody" has to
use GQL...my fault.
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Did quick check, Yes, KEY(' ') can be used if what's inside is an encoded
key, but I assumed that by a plain 1 it was an unencoded ID value.
On Wed, Jan 26, 2011 at 12:00 PM, Stephen Johnson wrote:
> Minor minor point :) I believe Ikai if you look at your posted code you
> forgot the entity kind
Minor minor point :) I believe Ikai if you look at your posted code you
forgot the entity kind in your call to KEY, you used KEY('1') without any
entity kind stated. I also was assuming he was using datastore viewer which
I think he was. Or is this KEY('1') allowed without entity kind allowed??
On
Minor point: I posted Python code because you used the term "GQL". I assumed
you were working with the datastore viewer - the code sample I posted should
be valid there.
Java code in JDO uses JDOQL.
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Ikai Lan
Developer Programs Engineer, Google App Engine
Blogger: http://googleappengine.blogspo
Also, check that the PMF.getPersistenceManager() returns a non-null value.
Perhaps with the changes you've been trying you don't have the
"transactions-optional" name in the config file matching the code.
On Wed, Jan 26, 2011 at 11:00 AM, Stephen Johnson wrote:
> Well, you shouldn't be getting a
Well, you shouldn't be getting a NullPointerException if the entity is not
found so something else is wrong. The correct exception would be
JDOObjectNotFoundException. Are you sure the PageParameters parameters is
not null or something else isn't null?? You don't use the 'a' variable in
anyway in t
Ok guys, even if the gql query is running I'm still not able to port
this logic into my java class.
Maybe someone could have a look at my code and correct/refer to my
mistake(s):
public GuestbookDetails( final PageParameters parameters ) throws
StringValueConversionException {
Persistence
Good to hear!
On Tue, Jan 25, 2011 at 5:24 AM, hrbaer wrote:
> Both the database query and the PMF singleton are working - thanks!
>
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Both the database query and the PMF singleton are working - thanks!
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