On Aug 14, 2008, at 13:49, Jeff Hellman wrote:
As soon as I bind the text field value to a key path (self.title or just title) in the ObjectController, then the below methods are called for each and every key in my ManagedObject.
It sounds like your object is being fetched with its properties faulted (well ... unloaded), until the properties are needed when the binding is established. At that point, perhaps, the properties are loaded, and set into the object with setValue:forKey:.
The real question is this: I'd like to set a "lastUpdated" key with the current time when a change is made to the object. Obviously, opening the file doesn't constitute a change being made so I can't have the currentTime being set upon file open without problems.
I think you'll have to do this at a different level. The assumption that setValue:forKey: (and hence will/didChange...) will be called only for a "genuine" change is untenable. At the very least, I think, the assumption is going to break when you undo a change.
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