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." <[email protected]> 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
