[Seaside] Scriptaculous example of SUEvaluator ?

Florian Minjat florian.minjat at emn.fr
Mon May 21 12:23:25 UTC 2007

Cédrick ENIT wrote:
> Florian Minjat a écrit :
>> Hi,
>>   I am trying to do a form with validators and confirmation in ajax. 
>> All the validation need to be done server-side. My problem is to do 
>> something like this in a onClick statement :
>>      isFormValid ifTrue: [html updater id: 'formDivId'; callback: [:r 
>> | self renderValidFormOn: r]
>>   But I need to evaluate isFormValid server-side with an Ajax request 
>> because it will only be set as true when the form is validate by ajax. 
>> So currently this updater never shows up.
>>   I think I could use the SUEvaluator, but couldn't find any example. 
>> So I don't really know how to use it.
>>   Does somebody know how to do that using as much seaside as possible? 
>> And can somebody give me an example of SUEvaluator?
> you have an example in the scriptaculous demo... CSS highlight in the 
> ajax tab...
> SUEvaluator is like an updater except it injects a javascript chunk in 
> the pasge if I remember well...
> your problem is because isFormValid is always set to false ?
> maybe after each form input, you need to make a SURequest so as to 
> change this...
> hth
> cédrick

My problem is that isFormValid must be processed server-side. I could 
add an hidden input for each validator and check it at the end but 
this is pretty heavy, not very secure, and I still need to add a test 
in javascript before the updater. I would rather prefer to use an Ajax 
request to get the value to test.

I looked at the example in the demo. SUEvaluator could be the trick to 
change the value of an hidden input.

But isn't there a simple way to do something like this :
onClick: ('if (', html ajaxRequest callback: [^ self isFormValid] 
,')', html updater... )


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