[fw-mvc] Zend Forms and Filters

Hey,

I've a little question how I could deal with Forms and Filters.

Lets say, I put a filter on an element that will change my input value.
Only, I find it always strange that, from the moment I do getPost I get the
unfiltered values.

What I do know, after the getPost I do:
$formData['day'] = Zend_Filter_MyFilter::filter($formData['day']);

In my opinion, I have to do 2 times the filter just to get the correct
value. In this example I only have to do it once, but what if I have 7
Filters in a form, it becomes a lot of work and code.
Isn't there a way to set the filter on the formelements, en get the filtered
values in the controller?

// form
$formElements[]= self::createElement('text','day')
->addValidator('int')
->addFilter(new Zend_Filter_MyFilter())
->addValidator('Between',false, array(0,24));

// controller
if ($this->_request->isPost()) {
$formData = $this->_request->getPost();
if ($form->isValid($formData)) {
... // submit value to db
}
}

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