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core data + undo + to-many relationship

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core data + undo + to-many relationship

Subject: core data + undo + to-many relationship
From: John Clayton <email@hidden>
Date: Sun, 07 Dec 2008 12:42:33 +0100

Hi everyone

In a core-data model I have a 'layer' which contains a to-many relationship to a set of 'effects'. When I add an effect, everything is working well.

When I use Ctrl-Z to have the undo manager undo the addition of the effect, then none of my custom accessors are fired (so my GUI doesn't react) - although the Effect instance faults and is deallocated (as I can see from my logging).

I thought implementing the accessors: addEffectObject: / removeEffectObject: and the set variations addEffects: / removeEffects: on my Layer core-data class was enough to get the undo management to work in this case - or did I misread the core-data docs?

Any hints / tips appreciated.

Thanks
--
John Clayton
Skype: johncclayton


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