Re: Listening for changes on an EO
Re: Listening for changes on an EO
- Subject: Re: Listening for changes on an EO
- From: Lon Varscsak <email@hidden>
- Date: Thu, 9 Jul 2009 12:26:22 -0700
Thanks. I figured there was nothing built to do exactly what I
needed, but I figured I would ask.
Do you know if there is much overhead if I implemented this in my EO
superclass even if there were no observers?
-Lon
On Thu, Jul 9, 2009 at 11:50 AM, Simon McLean<email@hidden> wrote:
> also, if you are using wonder, check out
> hasKeyChangedFromCommittedSnapshot in ERXGenericRecord. maybe listen
> for the notification mentioned by chuck, then use
> hasKeyChangedFromCommittedSnapshot to check the particular key you are
> looking at.
>
> simon
>
> 2009/7/9 Chuck Hill <email@hidden>:
>>
>> On Jul 9, 2009, at 10:24 AM, Lon Varscsak wrote:
>>
>>> Is there a way for a controller object to listen for changes to an EO
>>> (and a specific key)?
>>>
>>> Thanks,
>>>
>>> Lon
>>
>> EOEditingContext has ObjectsChangedInEditingContextNotification, but it is
>> on an object by object basis, not a key by key one.
>>
>> You could implement this in your EO super class.
>>
>>
>> Chuck
>>
>> --
>> 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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