Re: How to keep creation/modification date of a (Core Data) object?
Re: How to keep creation/modification date of a (Core Data) object?
- Subject: Re: How to keep creation/modification date of a (Core Data) object?
- From: "Arthur C." <email@hidden>
- Date: Mon, 09 Jul 2007 19:23:46 +0200
On 08/07/07, Arthur C. <email@hidden> wrote:
This must be a simple use of setKeys:
triggerChangeNofiticationsForDependentKey, but I can't find the right
method
for the key 'modificationDate'...
Creation date is easy, just an awakeFromInsert will do.
But the modification date (obviously) has to change whenever any of the
keys
in the object changes. Moreover, it has to keep its value when we are just
asking for the modification date (getter method), and on program
shutdown/restart.
Does it have to update everytime a value is changed, or only when the
object is saved and there are changed values (since those changed may
be reverted)? If so, you can override -willSave and update the
modification date in there.
In fact I want it to update on-the-fly, indeed. So a willSave is not
enough...
I tried adding an extra instance variable 'modificationDateChanged' (bool),
to be updated by triggerChangeNotification. The getter method would then
call setModificationDate; but somehow the method does not get called (i.e.
the triggerChangeNotification does not work).
Any better ideas?
Thanks,
Arthur C.
-Phil
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