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Re: Delete of parent object triggers delete of to-one destination object
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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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References: 
 >Delete of parent object triggers delete of to-one destination object (From: "Ricardo J. Parada" <email@hidden>)
 >Re: Delete of parent object triggers delete of to-one destination object (From: Chuck Hill <email@hidden>)
 >Re: Delete of parent object triggers delete of to-one destination object (From: "Ricardo J. Parada" <email@hidden>)

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