tried that and it's telling me
org.datanucleus.exceptions.NucleusObjectNotFoundException: Could not
retrieve entity of kind Thread with key Thread(51)
I also tried doing a query with the Thread key and UserKey (wich is the key
for a thread) and then I get an exception about modifying 2 entities in 1
transaction :S
On Tue, Feb 22, 2011 at 8:56 PM, Fernando O. <fot...@gmail.com> wrote:
> Thanks! I'll try that. BTW no, addComment does not store the comment.
>
> On Tue, Feb 22, 2011 at 8:49 PM, WillSpecht <willspe...@gmail.com> wrote:
>
>> Don't you need to persist the thread as well as the comment? It's
>> hard to analyze your code with such a small sample. Does addComment
>> persist the thread? My
>> guess is that something is making the transaction fail, probably
>> cause you are trying to operate on two different entity groups. I
>> would simply store the comment as it's own entity and when you want
>> all the comments simply do a query for comments with parentKey ==
>> ThreadKey.
>>
>> On Feb 21, 9:30 pm, "Fernando O." <fot...@gmail.com> wrote:
>> > Hi all.
>> > First of all I have to admit: I havent read all the docs.
>> >
>> > I had a small app running, it basically has this:
>> > A User:
>> > @PersistenceCapable(detachable = "true")
>> > @FetchGroup(name = "_post", members = { @Persistent(name = "posts") })
>> > public class User implements Serializable{
>> > @PrimaryKey
>> > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
>> > private Key key;
>> >> @Persistent(mappedBy = "user", defaultFetchGroup = "true")
>> > @Element(dependent = "true")
>> > private List<Post> posts;
>> > ....}
>> >
>> > A thread :
>> >
>> > @PersistenceCapable(detachable = "true")
>> > @FetchGroup(name = "_user", members = { @Persistent(name = "user")})
>> > public class Thread implements Serializable {
>> > @PrimaryKey
>> > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
>> > private Long key;
>> >
>> > @Persistent(defaultFetchGroup = "true")
>> > @Element(dependent = "true")
>> > private User user;
>> > ...
>> >
>> > }
>> >
>> > So now I want to add comments, each comment will have: the user that
>> made
>> > the comment, and the thread that it belongs to, and some other fields:
>> > @PersistenceCapable(detachable = "true")
>> > public class ThreadComment implements Serializable{
>> > @PrimaryKey
>> > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
>> > private Key key;
>> >
>> > @Persistent(defaultFetchGroup = "true")
>> > @Element(dependent = "true")
>> > private User user;
>> >
>> > @Persistent(defaultFetchGroup = "true")
>> > @Element(dependent = "true")
>> > private Thread thread;
>> > ...
>> >
>> > }
>> >
>> > I changed the Thread to include a list of comments:
>> > @PersistenceCapable(detachable = "true")
>> > @FetchGroup(name = "_user", members = { @Persistent(name =
>> > "comments"),@Persistent(name
>> > = "user")})
>> > public class Thread implements Serializable {
>> > ....
>> > @Persistent(defaultFetchGroup = "true")
>> > @Element(dependent = "true")
>> > private List<ThreadComment> comments;
>> >
>> > }
>> >
>> > My problem is that meanwhile this works in memory when I try to persist
>> the
>> > ThreadComment
>> > PersistenceManager pm = getPMF();
>> > Transaction tx = pm.currentTransaction();
>> > tx.begin();
>> > thread.addComment(comment);
>> > pm.makePersistent(comment);
>> > tx.commit();
>> > pm.close();
>> >
>> > the code gets excecuted but I don't see the comment in the database (in
>> fact
>> > the logs show no db activity either)
>> > So I don't see an exception, the code gets excecuted but I don't see the
>> > comment in the DB.
>> >
>> > I already have the db with soem threads without comments, this is a "new
>> > feature"
>> >
>> > Any idea of what I'm doing wrong? (please don't say everything :D )
>> >
>> > Thanks!
>> >
>> > Fernando
>>
>> --
>> 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-appengine-java@googlegroups.com.
>> To unsubscribe from this group, send email to
>> google-appengine-java+unsubscr...@googlegroups.com.
>> For more options, visit this group at
>> http://groups.google.com/group/google-appengine-java?hl=en.
>>
>>
>
--
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-appengine-java@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
