Re: Peer ECs in updating EO
Re: Peer ECs in updating EO
- Subject: Re: Peer ECs in updating EO
- From: amiel montecillo <email@hidden>
- Date: Fri, 20 Feb 2009 22:39:54 +0800
Cool! Thanks guys.
Amiel
On Fri, Feb 20, 2009 at 7:13 PM, David LeBer
<email@hidden> wrote:
On 20-Feb-09, at 4:15 AM, Cheong Hee (Datasonic) wrote:
Hi Amiel
Sorry for wrong title posted in previous email...
>> On 20/02/2009, at 4:47 PM, amiel montecillo wrote:
>>
> What I mean is, in PeerEC1, i made changes to the object, the changes are
> not seen in PeerEC2 thus calling PeerEC2.saveChanges() does not contain
> changes in the object right?
>
> I tried to do this in PeerEC2 (this is a bad hack):
>
> Post p = Post.localInstanceIn(PeerEC2, this.post);
> p.setSomething(this.post.something());
> PeerEC2.saveChanges(); <-- this actually reflects the changes to the DB.
>
>
> What could be a better route?
>
This URL will be useful to read about object graph management between
multiECs:
http://developer.apple.com/DOCUMENTATION/WebObjects/Reference/API5.2.3/com/webobjects/eocontrol/concepts/EOEditingContextConcepts.html#MANAGINGCHANGES
Two basic rules:
1. You cannot relate EOs in different ECs
2. You cannot move uncommitted EOs between ECs
And, in general I've always found it safer to do:
myEO.editingContext().saveChanges();
Rather than:
myEC.saveChanges();
That way you are guaranteed of getting the correct EC.
;david
--
David LeBer
Codeferous Software
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