On Jan 13, 2010, at 16:12, Daniel Wambold wrote:
> Nevertheless, I agree that the situation seems to suggest that the File >
> Open ("load") method that is being invoked by the NSPersistentDocument is
> creating a new managed object context that is not being attached to the
> controller. Despite my efforts to force this issue (such as posting the new
> MOC in a notification object), it fails. I assume this is because I was using
> the NSPersistentDocument persistent store assignment method, which occurs
> before the Nib is reconstituted, meaning that the value is lost in the
> initialization.
The next step is to narrow down the problem to a single area. ATM, we don't
even know if it's related to nib loading or to Core Data. You may need to
simplify your code to find out.
> I don't know if this is a clue, but I have never been able to get this
> program to respond to the request for [[NSApp delegate]
> managedObjectContext]. I DO have a delegate to the Application, but I have
> not yet done anything with it. Could this be part of the problem?
The application delegate has no inherent knowledge of managed object contexts,
and anyway -- in the case of a NSPersistentDocument-based application -- the
MOC is per-document, not per-application. ' [[NSApp delegate]
managedObjectContext]' isn't well-defined in such an application.
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