Re: Delete of parent object triggers delete of to-one destination object
Re: Delete of parent object triggers delete of to-one destination object
- Subject: Re: Delete of parent object triggers delete of to-one destination object
- From: Timo Hoepfner <email@hidden>
- Date: Thu, 7 Oct 2010 09:29:08 +0200
Hi Ricardo,
you mean Message.mimeType is a flattened attribute to
Message.mimeContent.mimeType? An this is causing the unwanted cascade
delete?
Sounds scary...
Timo
Am 06.10.2010 um 18:20 schrieb Ricardo J. Parada:
Thanks Chuck... You lead me to the problem.
My Message entity has a mimeType property derived from
mimeContent.mimeType. So it seems that is the reason why EOF is
deleting the mimeContent to-one when I delete the parent Message.
On Oct 5, 2010, at 8:26 PM, Chuck Hill wrote:
Is there another relationship with Owns Destination or Cascade
Delete set on it. Those are the only things that I can think of
that would make EOF delete an EO. Could it be happening in your
code?
Chuck
On Oct 5, 2010, at 4:22 PM, Ricardo J. Parada wrote:
Hi,
When I remove a child from a many-to-many relationship in the
parent and delete the child I see EOF deletes the child in the
database and the corresponding record in the join table. That's
great. However, the child object has a to-one called mimeContent
and I'm also seeing a delete for the destination object:
DELETE FROM MIME_CONTENT WHERE MIME_CONTENT_ID = ?" withBindings:
1:26954(NeededByEOF0)
1 row(s) deleted
I'm trying to figure out why this record is being deleted. I
already checked the "Own Destination" for the mimeContent to-one
and it's not set. The "Delete Rule" is set to "No Action". So I
don't quite understand why it's getting deleted. I don't want it
to be deleted.
Any ideas?
Thanks,
Ricardo
--
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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