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Re: Tracking Fields and EOF
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Re: Tracking Fields and EOF


  • Subject: Re: Tracking Fields and EOF
  • From: Max Ribuoli <email@hidden>
  • Date: Mon, 13 Jun 2005 20:12:59 +0200

In validateFor() methods is safe to modify self, problems may occur if you perform changes on other EOs because the validateForSave occurs in saveChanges() and any new updated/inserted object may not queued in current saveChanges.
What you have to do is to update any property before the super.validateFor...() method, so the model key-level validation can be handled, and after the super.validateFor...() you can perform your own validation controls.


Max Ribuoli

On Jun 13, 2005, at 18:01, Ricardo Cortes wrote:



I'm already using some parts of the Wonder frameworks so I'm going to go
with Alan's suggestion of using the ERCStampedEnterpriseObject class as
I just glanced at the code and it overrides willInsert(), willDelete()
and willUpdate() accordingly and provides the created/lastModified
fields. I appreciate all the other suggestions.


By the way, isn't modification of EOs in the validateFor() methods a
cardinal sin in the EOF world?

On Mon, 2005-06-13 at 16:33 +0200, Max Ribuoli wrote:



It's not a good idea to use awakeFromInsertion because it's called
everytime you insert an object into an editingContext.
I suggest you to use validateForSave and validateForInsert:

public void validateForInsert() throws
NSValidation.ValidationException {
     setCreationDate(new NSTimestamp());

     super. validateForInsert();
}

public void validateForSave() throws NSValidation.ValidationException {
setModificationDate(new NSTimestamp());


     super. validateForSave();
}



Max Ribuoli

On Jun 13, 2005, at 16:13, WebObjects Lover wrote:





Hi there,

I need to add tracking fields to my database that
track when a record was last updated and when a record
was added.  I believe I can use the awakeFromInsertion
method on EOCustomObject (in the superclass for all my
EOs) to set the time the record was added but I'm a
little confused how I set the date last modified time
automatically?  Or, is this something I need to set on
the EO before I save changes?  Thanks...





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References: 
 >Tracking Fields and EOF (From: WebObjects Lover <email@hidden>)
 >Re: Tracking Fields and EOF (From: Max Ribuoli <email@hidden>)
 >Re: Tracking Fields and EOF (From: "Ricardo Cortes" <email@hidden>)

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