Cake php,validation message not showed - php

Question

i'm not able to catch and show validation errors into my CakePHP controller class.
I've this model:
public $validate = array(
'username' => array(
'notEmpty' => array(
'rule' => array('notEmpty'),
'message' => 'Your custom message here',
'allowEmpty' => false,
'required' => true,
//'last' => false, // Stop validation after this rule
//'on' => 'create', // Limit validation to 'create' or 'update' operations
),
'alphaNumeric' => array(
'rule' => array('alphaNumeric'),
'message' => 'Your custom message here',
//'allowEmpty' => false,
//'required' => false,
//'last' => false, // Stop validation after this rule
//'on' => 'create', // Limit validation to 'create' or 'update' operations
),
'maxLength' => array(
'rule' => array('maxLength', 50),
'message' => 'Your custom message here',
//'allowEmpty' => false,
//'required' => false,
//'last' => false, // Stop validation after this rule
//'on' => 'create', // Limit validation to 'create' or 'update' operations
),
));
and this is how i try to catch validation message into controller while save a new element into array:
public function add() {
if ($this->request->is('post')) {
$this->Admin->set($this->request->data);
//$this->Admin->create();
if ($this->Admin->validates()) {
// it validated logic
if ($this->Admin->save($this->request->data)) {
$this->Session->setFlash(__('The admin has been saved.'));
return $this->redirect(array('action' => 'index'));
} else {
$this->Session->setFlash(__('The admin could not be saved. Please, try again.'));
}
} else {
// didn't validate logic
$errors = $this->Admin->validationErrors;
debug($errors);
}
}
}
but it doesn't work. If i pass an empty field an alert with a default message is showed into add.ctp page. If i insert a duplicate, no message is showed.

Answer 1

You don't need
$this->Admin->set($this->request->data);
$this->Admin->validates(){}
because if you are using "save"
$this->Admin->save($this->request->data)
is validating already. That should do the job.