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: "Ricardo J. Parada" <email@hidden>
- Date: Thu, 07 Oct 2010 11:02:38 -0400
Correct. I got rid of that flattened attribute and things work as expected now. The cascade delete no longer happens.
On Oct 7, 2010, at 3:29 AM, Timo Hoepfner wrote:
> 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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