Encrypt password custom rule in DataMapper and Codeigniter -

i using codeigniter 2.0.3 datamapper orm 1.6.0. integration datamapper in ci has been implemented , works fine, except password encryption.

i have model called users.php class users. have set validation rules:

var $validation = array(     array(         'field' => 'password',         'label' => 'password',         'rules' => array('required', 'trim', 'unique', 'min_length' => 5, 'encrypt'),     ),     array(         'field' => 'email',         'label' => 'email address',         'rules' => array('required', 'trim', 'valid_email')     ) ); 

my encrypt function in validation rule:

function _encrypt($field) {     // don't encrypt empty string     if (!empty($this->{$field}))     {         // generate random salt if empty         if (empty($this->salt))         {             $this->salt = md5(uniqid(rand(), true));         }          $this->{$field} = sha1($this->salt . $this->{$field});     } } 

mysql users table structure:

id email password last_login created_on 

i simple create new user via controller:

$u = new users(); $u->email = 'mario1@mario-design.info'; $u->password = 'mario'; $u->save(); 

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edit 1:

full code of users.php model here.

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user stored in database original password not encrypted.

what doing wrong?

thanks, regards mario

i believe it's salt class variable missing. in _encrypt function, call $this->salt, however, never declare salt in model. think need add salt variable in class:

// in users model <?php if (!defined('basepath')) exit('no direct script access allowed.');  class users extends datamapper {      var $table = 'users';     var $has_one = array('profile');     var $salt = 'b1471tu77ik1411'; // string - helps make password encryption stronger