Re: Need Help on EOModel Auto update of DATE column for DirectToWebapp

On Nov 9, 2009, at 3:00 AM, Pierre Gilquin wrote:

> if the last  line is not forgotten, I did not have any problem  
> modify an EO  :
>
> editingContext().processRecentChanges();


You may  not have had, or noticed, any problem so far.  But this is  
NOT safe.  This can modify EOs during saveChanges() and EOF is not  
expecting that to happen.  Both Wonder and Practical WebObjects  
provide an implementation of the correct, safe way to make such changes.


Chuck


>
> Pierre
> ----- Original Message -----
> From: Paul Hoadley
> To: [email protected]
> Sent: Monday, November 09, 2009 11:05 AM
> Subject: Re: Need Help on EOModel Auto update of DATE column for  
> DirectToWebapp
>
> On 09/11/2009, at 7:22 PM, Pierre Gilquin wrote:
>
>> You can use trigger in the database
>> or with EOF, you can implement validateForInsert() and  
>> validateForUpdate()
>> in the Java class of your entity
>
> You don't want to go modifying EO attributes in validateForInsert()  
> or validateForUpdate():
>
> http://wiki.objectstyle.org/confluence/display/WO/EOF-Using+EOF-The+EOF+Commandments
>
> Depending on the OP's specific requirements, s/he might be able to  
> use awakeFromInsertion() or awakeFromFetch(), or, better still,  
> ERXEnterpriseObject's willInsert() or willUpdate().  See which of  
> those fits the specific requirements.
>
>
> -- 
> Paul.
>
> w  http://logicsquad.net/
> h  http://paul.hoadley.name/
>
>
>
>
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-- 
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