You can try objectContext.registerNewObject(event);
The tricky part is relationships. Cayenne doesn't really have the notion of
"detached" objects, the way hibernate does. But as long as you are relating a
new object to an existing object, cayenne will auto-add the new object to the
existing object's data context, as long as the new object isn't already
associated.
HTH
Robert
On Apr 30, 2011, at 4/302:46 PM , Tony Dahbura wrote:
> I have an existing code base that is written around a mvc framework.
> The code consists of actionbeans that call database methods to read data and
> build out objects (e.g. UserRecord etc). The framework presents the
> data and lets the user edit values and then when the actionbean is called
> (during a form submit) it processes updating the database.
>
> I would like to reimplement the database work using Cayenne.
>
> My question is I do not want to expose the action beans (which are only
> around during request scope not session) to have to deal with calling
> Cayenne. I was working to adjust my database class to handle the Cayenne
> calls. These methods take an argument of an object to write to the database
> or update for example:
>
> public boolean insertNewEvent(Event event) {
>
> write event record to database
>
> }
>
>
> My code is beginning to look like this using cayenne:
>
> public boolean InsertNewEvent(Event event) {
> DataContext context = this.getContext();
>
> Event ev = (Event)context.newObject(Event.class);
>
> ev.setEventdate(event.getEventdate());
> ev.setNotice(event.getNotice());
> ev.setPkey(event.getPkey());
> ev.setTimeend(event.getTimeend());
> ev.setTimestart(event.getTimestart());
> ev.setCategory(event.getCategory());
> ev.setNotice(event.getNotice());
> ev.setPkey(-1);
>
> context.commitChanges();
>
> return true;
> }
>
>
> I am finding myself creating an equivalent object using the context.newObject
> call and copying the fields from my Event object to the one created by the
> call to context.newObject. Is there a better way to do this. For instance
> if I have been passed an event object that was not created with Cayenne
> context call how do I make Cayenne pick it up and use it for the commit? Or
> should I have the action bean which is creating this new object call the
> context.newObject and get back an event from cayenne (which I really was
> hoping not to do (did not want to litter my action bean code with calls to
> cayenne)).
>
> Is there a way to take an event object and make the cayenne context aware of
> it so it can write or update it without copying the fields one by one?
>
> Thanks,
> Tony
>
>
>
