Regarding the first issue (proxy object), will read the docs on NSProxy and all that that leads to.

Regarding the second issue (copyWithZone), I had bound the content of an array controller to a relationship based on the selection in another controller, but bindings for the value portion of the corresponding view was missing the model key. A million thanks for pointing this out.

On Feb 25, 2009, at 3:05 PM, Kyle Sluder wrote:

On Wed, Feb 25, 2009 at 2:43 PM, Daniel Child <wch...@hawaii.edu> wrote:
The object I'm adding was obtained by using
NSManagedObject *theWord = [wordList selection]
This yields a proxy object instead of an MO. (Does anyone know why?)

Read the documentation for -[NSObjectController selection].  It's
right there in black and white: "A proxy object representing the
receiver’s selection. This object is fully key-value coding compliant,
but note that it is a proxy and so does not provide the full range of
functionality that might be available in the source object."

-[NSManagedObject copyWithZone:]: unrecognized selector sent to instance
0x1adf50

Typically this happens when you've bound a view to the selectedObjects
of a controller and not provided a keypath.  Often times views copy
their object values, but NSManagedObjectContext does not support
NSCopying.  Make sure that all your bindings are to keypaths, not just
to the objects themselves.

--Kyle Sluder

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