Hi!
I'm studying Computer Science and I am italian. Actually I'm new to the
NoSQL world, have a little experience with Google App Engine
(DataStore/BigTable) and MongoDB… I need to create a social network website
for the university. Well, only the data model scheme. A little one, of
course. Nothin
Thanks!
Well, in JDO you can do:
Query q = pm.newQuery("select id from " + MyClass.class.getName());
I think __key__ can work too, but not sure.
On 4 July 2011 19:09, jMotta wrote:
> Thiago,
>
> Nowadays the amount of documentation and features of both interfaces are
> almost equals. Java has
True. I had forgotten about the unowned relationships, but I think again I
will need to retrieve the collections in order to add the new Key, right? Of
course it's much better to retrieve a collection of keys than a collection
of entities. And maybe making the relationship from the LoginHistory to
You just need to retrieve it, change it and close the persistence manager.
No makePersistent method needed.
For example:
public void updateEmployeeTitle(User user, String newTitle) {
PersistenceManager pm = PMF.get().getPersistenceManager();
try {
Employee e = pm.getObjectById(
