zend form dispatch a validator onblur an element - zend-framework

Question

Is that possible?
I already wrote a simple validator that is triggered when the form is submitted.
Can I use the same validator, but it must be triggered right after the input field has been left.
is it possible?
pablo

Answer 1

It would be possible, here is one way to go about it.
Add a Javascript onblur event to the form element
The onblur call sends an ajax request containing that one field and its value to a ZF action
The action calls the validator on that element, or uses Zend_Form::isValidPartial to check the populated element
Return a JSON response indicating valid/invalid and optional error message
On ajax complete, read the JSON response and update HTML to reflect the result of validation
Hope that helps.

Answer 2

This is part of working example:
Backend:
class UserController extends Zend_Controller_Action
{
/* ... */
public function validateAction()
{
if ($this->_request->isXmlHttpRequest()) {
$values = $this->_request->getParam('values');
$form = new Form_User();
$isValid = true;
if (!$form->isValidPartial($values)) {
$isValid = $form->getMessages();
}
$this->_helper->json(array('errors' => $isValid));
}
}
/* ... */
}
Frontend, (just ajax call part) should be attached on event:
$.ajax({
type: "POST",
url: "/user/validate/",
data: {
'values': $('#my-form-id').serialize()
},
dataType: "json",
beforeSend:function(){
},
success: function(response){
var result = response.errors;
if (result == true) {
// given fields are valid
// do some extra stuff here
} else {
// invalid
// do some extra stuff here
}
}
}
});