On Tue, Jul 24, 2012 at 11:27 AM, Sean McBride <[email protected]> wrote:
> Yes.  My object is a subclass of NSObject and I don't override isEqual:.  As 
> I test, I overrode it and always return NO.  At first, I thought this did the 
> trick, since Core Data passed through this and saved properly; but alas, it 
> only seems to go through the path once after the document is opened, not 
> every time I ask it to save.

Are you still also triggering the KVO notices and/or using the setter?

My thinking was that you probably need both things: first, to take an
action that causes Core Data to notice you're changing the value (like
calling -will/didChangeValueForKeyPath:), and second, that when Core
Data compares the before and after values, that they are not -isEqual:
to one another.

(But, to be clear, this is untested supposition on my part.)

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