On 5/6/08 2:03 PM, Keary Suska said:

>> I have an app that uses an NSOutlineView bound to an NSTreeController in
>> entity mode.  The tree controller matches all 'Shape' entities, but
>> there are also sub-entities named 'Square' and 'Circle'.  I have a
>> master-detail UI.  All 'Shapes' have a 'name' attribute and there is no
>> problem there.  Only 'Circle' has a 'radius' attribute however, and I
>> want to show this in a textfield.  I've bound the textfield and
>> unchecked the 'Raises For Not Applicable Keys'.
>>
>> The problem is that I'm still getting an NSException raised.  It's
>> raised from [Circle valueForUndefinedKey:].  'Circle' is an
>> NSManagedObject subclass.
>>
>> Does one also have to implement valueForUndefinedKey: in this
>> situation?  I thought removing 'Raises For Not Applicable Keys' was
>> supposed to be sufficient.
>
>I think you also have to specify a "Not Applicable" placeholder as
>well--have you done that?

I have.  And it is even correctly shown in the textfield.  But I still
get the exception thrown by NSManagedObject's valueForUndefinedKey:  The
docs even say "The default implementation raises an
NSUndefinedKeyException" which seems to be what I'm seeing, but I don't
get why its happening even with 'Raises For Not Applicable Keys' off.

Thanks for your help Keary.

--
____________________________________________________________
Sean McBride, B. Eng                 [EMAIL PROTECTED]
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada

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