Garrick,
What you are doing is much more complex than most situations. I can
tell you that with WO 3.51, we are successfully implementing everything that
you have outlined except the multiple database issue.
You've probably already tried this, but, if not, I would suggest
building an incredibly simple example with two models and one entity in each
model with a relationship between the entities. If you are still having a
problem in this simple example, send the example to Apple. Every programmer
loves a reproducible error that can be demonstrated in a simple app.
I do know that the Omni guys have attested to the fact that
connecting to multiple data sources works, but I don't believe they provided
any specific information on their setups. You might want to search the
archives for these posts ( I don't know what the subject was, but it might
include the word 'multiple' ).
Regards,
Paul
Garrick McFarlane wrote:
[ OK, well, it looks like I'm out of luck here.
[
[ Can I ask: has anyone out there _successfully_ created a WO4/EOF3 app
[ that:
[
[ -- has multiple eomodels
[ -- where each eomodel is for a different database
[ -- where entities in one eomodel have relationships to entities in
[ another model
[ -- where those entities are instantiated and their relationships
[ manipulated programmatically in the app (ie, not just fetched from the
[ db) -- and then succesfully inserted those back into the database(s)?
[
[ I received a report of one other site suffering from this problem (using
[ Obj-C not Java in this case), and a couple of sensible but unsuccessful
[ suggestions that didn't fix the problem.
[
[ Best wishes
[
[ Garrick
[
[ ** -----Original Message-----
[ ** From: McFarlane, Garrick [mailto:[EMAIL PROTECTED]]
[ ** Sent: Wednesday, February 24, 1999 3:33 PM
[ ** To: Multiple recipients of list
[ ** Subject: BUG? recordToManySnapshots with multiple eomodels/databases
[ **
[ **
[ ** Sorry for the cross-post. I posted this to the EOF list a
[ ** few days ago but
[ ** it seems that the WOF list is where all the action is these days.
[ **
[ ** I believe this is a bug in the current release of WO4/EOF.
[ ** I'd be most
[ ** grateful if anyone can suggest a workaround. The problem
[ ** appears to centre
[ ** around a project having multiple eomodels which connect to different
[ ** databases, and objects in those eomodels having
[ ** relationships across models
[ ** to each other.
[ **
[ ** And please don't let the company standard email disclaimer
[ ** at the end put
[ ** you off replying!
[ **
[ ** Thanks -- original message follows:
[ ** -------------------------------------------------------------
[ ** ------------
[ **
[ ** Hello
[ **
[ ** Well I'm opening myself up to a fresh torrent of spam in the
[ ** hope that
[ ** someone here can help me. I'd like to know if I'm doing
[ ** something wrong here
[ ** or am hitting a (dare I suggest it) bug in EOF3.0. The smart
[ ** money's on me
[ ** doing something wrong. I'd be grateful at least if anyone else who's
[ ** encountered anything like this could give me some clues, a 'me too',
[ ** workaround, anything...
[ **
[ ** Garrick McFarlane, OO Type
[ ** Linklaters and Paines
[ ** London, England
[ ** Tel: +44 171 456 5765
[ ** ----
[ **
[ ** Environment:
[ ** EOF3.0; Java; WOF4.0; NT4SP3; Sybase
[ **
[ ** Possible factors:
[ ** multi-eomodel project/app, including cross-model,
[ ** cross-database relationships.
[ **
[ ** Error encountered:
[ ** "recordToManySnapshots:: cannot record objects in a
[ ** context when no
[ ** transaction is in progress"
[ **
[ ** Scenario:
[ ** I'm instantiating a couple of eocustomobject
[ ** subclasses, inserting
[ ** them into an editingcontext, relating them to some
[ ** preexisting fetched
[ ** eocustomobject subclasses in another model/database, and
[ ** then saving the
[ ** editing context. All objects (in all models) are in the same editing
[ ** context. EOF is successfully preparing the objects, fetching
[ ** primary keys,
[ ** generating the correct 'INSERT INTO' SQL, submitting it to
[ ** Sybase, but then
[ ** just when everything appears to have completed, the whole
[ ** lot gets rolled
[ ** back with the EOF error message above.
[ **
[ ** If I remove the 'addObjectToBothSidesOfRelationship' calls
[ ** which relate the
[ ** new instances to objects in other models/databases, the
[ ** editingcontext.save() succeeds. But, of course, I need my
[ ** objects to be
[ ** related across the models...
[
[ <etc>
---
Paul Summermatter
LGS Systems, Inc.
Medical Computing Division
15 TJ Gamester Ave
Portsmouth, NH 03801-5871
(603) 433-9822 voice
(603) 433-9818 fax
(888) 898-6321 pager
[EMAIL PROTECTED] paging email
[EMAIL PROTECTED]
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http://www.lgs-systems.com
