Cake php modal validation error - cakephp

Question

I have a simple registration form and complete model validation.
public function add() {
// Has any form data been POSTed?
if ($this->request->is('post')) {
$this->User->set($this->request->data); //echo '<pre>'; print_r($this->data);exit;
if($this->User->validates()){
if ($this->User->save($this->request->data)) {
// Set a session flash message and redirect.
$this->Session->setFlash('User Saved!');
return $this->redirect('/users');
}
}
}
}
Modal validation code is below
class User extends AppModel {
public $validate = array(
'username' => array(
'alphaNumeric' => array(
'rule' => 'alphaNumeric',
'required' => true,
'message' => 'Alphabets and numbers only'
),
'between' => array(
'rule' => array('between', 5, 15),
'message' => 'Between 5 to 15 characters'
)
),
'password' => array(
'rule' => array('minLength', '8'),
'message' => 'Minimum 8 characters long'
),
'email' => 'email',
'born' => array(
'rule' => 'date',
'message' => 'Enter a valid date',
'allowEmpty' => true
)
);
}
The problem is that when i delete html fields using firebug and submit form it save data with blank entries . i think its a big problem i am facing because it not good practice to save blank entry and i want to stop it by the hacker or any one.
please help.

Answer 1

Add the validation rule 'notEmpty' for all fields which shouldn't be blank entries in the database.
Reference: cookbook

Answer 2

I am agree with semmelbroesel13
please use notEmpty rules as:
'rule' => array('notempty')
Updated:
Please try below code and check whats the query exactly
public function add() {
// Has any form data been POSTed?
if ($this->request->is('post')) {
$this->User->set($this->request->data); //echo '<pre>'; print_r($this->data);exit;
if($this->User->validates()){
if ($this->User->save($this->request->data)) {
$log=$this->User->getDataSource()->getLog(false, false);
echo "<pre>";print_r($log);exit;
// Set a session flash message and redirect.
$this->Session->setFlash('User Saved!');
return $this->redirect('/users');
}
}
}
}