Hi all!
I'm trying to update some child objects to the datastore via
PersistenceManager, but my data is never updated/overrided when I use
makePersistent with such object directly. I need to do that in order
to avoid sending a whole entity via RPC, but to send just the child
object I need to update.
1. When I do something like saveMethod(parent), then the parent object
and the child are saved both.
2. Then, when I load the child and I try so save it again like:
saveMethod(child) the method "saves" it correctly (no errors found
and returns true)
3. But when I try to reload the child, It has not being updated.
(See context above)
Aditionally, I want to delete some of these children, but It has been
imposible too, like this:
parent.removeChild(childIndex);//this removes the child from ArrayList
of children
saveMethod(parent);
But, when I reload parent, it stil has the "removed" child.
(Help me please!). Thanks a lot.
Magus.
==========================================================
Some context:
Classes:
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable = "true")
public class Parent{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent(defaultFetchGroup = "true")
private List<Child> children;
...
}
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable = "true")
public class Child{
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
@PrimaryKey
private Key id;
@Persistent
private String field;
...
}
saveMethod:
public <T> boolean saveMethod(final T object) {
PersistenceManager pm =
PersistenceManagerFactory.get().getPersistenceManager();
try {
pm.makePersistent(object);
return true;
} catch (Exception e) {
return false;
} finally {
pm.close();
}
}
--
You received this message because you are subscribed to the Google Groups
"Google Web Toolkit" 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-web-toolkit?hl=en.
