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Re: Nested Editing Contexts
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Re: Nested Editing Contexts


  • Subject: Re: Nested Editing Contexts
  • From: Paul Lynch <email@hidden>
  • Date: Wed, 6 Jun 2007 07:35:48 +0100


On 31 May 2007, at 07:34, Jean Pierre Malrieu wrote:

This as not always been so clear. In Apple's WO formation support material (around 2002), they did talk about a method of dealing with object editing and backtracking: they call it "deferred insertion". Basically, they say you can set attributes (not relationships) on a non inserted EO, and then insert it if the user commits his changes.

<rant>
And given the amount of effort Apple is putting in WO, I wouldn't be surprized if this is still the case in the current training course support material... But I may be wrong. Did they even update the training documentation to use xCode, and not ProjectBuilder? For a while they did not. And they charged a lot of money for an outdated documentation. But now those days are gone, and Apple has cash enough to devote more efforts to WO...
</rant>

I'm picking on this one because it contains most of the points I want to make; I would have responded faster, but I was actually teaching this course last week :-). Just for the record, we have taught the 2 WO classes using Apple's materials since they were first offered, so I should have a pretty decent recall of them.


The training course was indeed updated to use Xcode from ProjectBuilder, several years ago; 2003/2004 at a guess. The materials were released to us about six months after the changeover, with some indication that Apple had been using those notes already for some time.

The intro class doesn't explicitly mention awakeFromFetch/ awakeFromInsertion, although it does include coverage of createAndInsertInstance, which is where I would discuss this. The advanced class has more discussion available for it.

'Deferred insertion' is mentioned on one of the slides, I believe - I use this as an opportunity to point out that it's a bad idea - one of the code examples used to do this, I don't know if it still does.

One of the points I always make explicitly in the class is that the delivery of the course consists of the slides, the notes, and the instructor - and all three may be necessary; one (or two) alone won't do such a complete job.

Paul

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