Hi,
I have succeed in getting the local_db.bin after I change my Student
class.
Initially my Student class is like this:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Student {
@PrimaryKey
@Persistent
private String googleAccount;
@Persistent
private String name;
@Persistent
private Team team;
...
}
where Team is another @PersistenceCapable object.
And I only store the Student object persistently.
After I change the type of team to integer (private int team). Things
run smoothly.
Another question would be: is there any way to store the field team as
type Team? Maybe I need to store the Team object persistently first
and then store Student object?
regards,
Xiaoni,
On Jul 20, 12:13 am, Ronmell Fuentes <ringe...@gmail.com> wrote:
> Hello Erencie.
>
> have you tried to save persistence objects in data store? and have you tried
> to retrieve all data saved in your data store?
> does it show any error?
>
> are you using something like JUnit or something besides the code shown in
> google tutorials?
>
> Rgds.
>
> R
>
> 2010/7/19 Erencie <xiaoni....@gmail.com>
>
>
>
> > I use Google app Engine plugin for Eclipse and managed to make the
> > "guestbook" demo run successfuly. When I create my own app by
> > following the code pattern of "guestbook", sth weird happens:
>
> > Jul 19, 2010 6:08:46 AM
> > com.google.appengine.api.datastore.dev.LocalDatastoreService load
> > INFO: The backing store, D:\Eclipse workspace\TeammateV0.0\war\WEB-INF
> > \appengine-generated\local_db.bin, does not exist. It will be created.
>
> > I noticed that in /war/WEB-INF/appengine-generated folder, there is
> > only "datastore-indexes-auto.xml", but no "local_db.bin" file exists,
> > unlike the case in the demo guestbook project.
>
> > And I find that I cannot store anything persistent objects, even
> > though I follow the correct codes in tutorials. However, the whole
> > thing runs without any errors.
>
> > I tried diff configurations in the few xml files, and tried using
> > transactions as well. I did also closed the persistentFactory. But
> > nothing changes.
>
> > Can anyone help me?Thanks a lot.
>
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