Re: Inheritance and relationships
Re: Inheritance and relationships
- Subject: Re: Inheritance and relationships
- From: David LeBer <email@hidden>
- Date: Fri, 8 Aug 2008 21:31:04 -0400
On 8-Aug-08, at 7:53 PM, Guido Neitzer wrote:
On 08.08.2008, at 15:11, Chuck Hill wrote:
Hmmm. Back to the old application, FETCHING works now. Resolving a
relationship to an object that was NOT cached earlier, crashes.
When I do a fetch, the relationship is resolved just fine when the
object the relation is pointing to was fetched before. But it
stops working as soon as the timestamp lag is reached.
Weird.
What glorious fun for a Friday!
This is sounding more like a variant of the problem Mike worked on
in Wonder: if you fetch the object, the GID is set correctly. If a
relationship is followed, it is set incorrectly. This is a total
guess.
But it sounds like the thing I'm seeing. And I didn't have time
exploring that much. Just switched to that workspace a couple of
times when I thought I had an idea. But I was at the office today so
I didn't have much time for tinkering with it.
At least I'm down to the following scenario:
1. Fetching the stuff with a normal fetch works now.
2. Following a relationship does not work, if I haven't fetched that
object at the end of the relation before.
After a while I get null values back when I try to access something
that follows that relationship - on an object where I got a valid
value back before. Very, very weird!
I saw these exact symptoms when trying to use Wonders ERAttachment.
My model was from an abstract Product entity to the abstract
ERAttachment entity.
I 'resolved' (read: I punted) the issue by modeling directly to the
ERFileAttachment entity instead.
;david
--
David LeBer
Codeferous Software
'co-def-er-ous' adj. Literally 'code-bearing'
site: http://codeferous.com
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--
Toronto Area Cocoa / WebObjects developers group:
http://tacow.org
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