Think I found the solution, thanks to this:
http://groups.google.com/group/google-appengine-java/browse_thread/thread/fb12ab60c68bf664/4179ae7a25931a53?lnk=gst&q=usersTemp#4179ae7a25931a53
Now I'm updating the counter using that method and everything is
working as expected...
public void updateQ
Hi,
Thanks for your answers. I'm doing my first steps in JDO and indeed
relate it as another relational db... :-)
Regarding your first comment - I'm not trying to persist a list, just
a single UserStats object. A list is mentioned in the code since
execute() returns list of objects. If list is e
Whoops, sorry; ignore my remark about UserStats not being persistable; I looked
again at your code and saw that it has a key. I was confused and thinking that
you're persisting the List, not an item in the List. But I think the problem
with it becoming a root object still remains.
Rusty Wri
1) In the case of result.isEmpty(), I don't see where you're adding the new
UserStats to the result list.
2) When you do pm.makePersistent( stats ) I think you're going to have a
problem adding the new stats to the List, because that
makePersistent is going make a new stats a root/parent objec
Here it is:
PersistenceManager pm = PMF.get().getPersistenceManager();
List result = (List) pm.newQuery( "select from "
+ UserStats.class.getName() + " where id == '" + session.getId() +
"'" ).execute();
if( result.isEmpty() )
stats = new UserStats( session.getId(), System.currentTimeMillis
Can you post the code that you're using to re-persist the updated HashMap?
- Jason
On Thu, Oct 29, 2009 at 6:07 AM, barak wrote:
>
> Thanks, did that and the map is indeed serialized now. But now, the
> enitity is fetched, seems like the state is not always kept.
>
> For example, I would like t
Thanks, did that and the map is indeed serialized now. But now, the
enitity is fetched, seems like the state is not always kept.
For example, I would like to store some attribute from an HttpSession
using the UserStats instance. Every time a user in a session press
some button, a instance is fetc
http://code.google.com/intl/pl/appengine/docs/java/datastore/dataclasses.html#Collections
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
"Google App Engine for Java" group.
To post to this group, send email to google
HashMap isn't supported as a persistable type.
The only way you've got to persist it is serialize it:
http://gae-java-persistence.blogspot.com/2009/10/serialized-fields.html
Cheers
barak wrote:
Hi,
I'm trying to persist the following class:
@PersistenceCapable(identityType = IdentityType
