The duplicate problem is likely fixed by giving the tee controller a
fetch predicate in IB. Set the predicate to something like
parent==nil. This will obviously depend on what you've called your
'parent' property.
I've blogged about doing this with drag and drop in core data and non-
core data apps.
http://espresso-served-here.com
HTH
Jon
On 15 Jul 2008, at 22:59, "Sean McBride" <[EMAIL PROTECTED]>
wrote:
Hi all,
I have an outlineview populated by binding to a treecontroller. It
displays CoreData entities of type "Person". "Person" has 'parent'
and
'children' relationships. Displaying everything works fine.
Now the outlineview must support drops. In my windowcontroller, I
implement outlineView:acceptDrop:item:childIndex: and look for my
custom
pasteboard type. If it's there, I need to create a new "Person"
entity. How should I do this?
I have tried:
a) [myTreeController add:nil];
b) Person* person = [myTreeController newObject];
[person setParent:...];
c) Person* person = [NSEntityDescription
insertNewObjectForEntityForName:@"Person"
inManagedObjectContext:moc];
[person setParent:...];
In all cases, the outlineview shows 2 of the new person. The
problem is
not on the model side, since if I close and reopen the window, only 1
new person is there.
Thanks,
--
____________________________________________________________
Sean McBride, B. Eng [EMAIL PROTECTED]
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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