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Re: local instances, child contexts, related EOs
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Re: local instances, child contexts, related EOs


On Dec 21, 2008, at 6:28 PM, Tom Woteki wrote:

Hi All:

I've looked in various online tutorials etc but I haven't found the answer to this question: when I create a local instance of an EO in a child context, how to do I conveniently cause the related EOs to be brought along into the child EC? I'm assuming there must be a method or standard way of doing this but I can't see it.

You don't need to do anything. The related objects will be faults until you reference some data from them, at which point the fault will be fired. As the fault is in an EC with a parent EC, the fault will be resolved from the parent EC rather than the object store. If the EO is not in the parent EC, then it will fall back to the object store and then back to the DB if there is no snapshot in the object store.


I have tried this:

	EOEditingContext ec, localEC;

	myLocalEO = ec.localInstanceOfObject(localEC, myEO);
	myLocalEO.updateFromSnapshot(myLocalEO.snapshot());

but this only results in faults for the related objects. 

The second line is not and faults for the related objects is normal.


What is the practice for obtaining local copies of an EO and all its related EOs? I want to do this in order to edit the locals in the child EC. 


Just edit them as you would in any other situation.  It just works.


Chuck

--
Chuck Hill             Senior Consultant / VP Development

Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
http://www.global-village.net/products/practical_webobjects






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 >local instances, child contexts, related EOs (From: Tom Woteki <email@hidden>)























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