php - password confirmation doesn't work, not defined -

as said in title. got following error message

property "user.repeat_password" not defined. 

although have defined in user model.

class user extends cactiverecord {      public $repeat_password;      /**      * @return string associated database table name      */     public function tablename()     {         return 'sys_user';     }       /**      * @return array validation rules model attributes.      */     public function rules()     {         // note: should define rules attributes         // receive user inputs.         return array(             array('password, repeat_password', 'required', 'on'=>'insert'),             array('password, repeat_password', 'length', 'min'=>6, 'max'=>40),             array('repeat_password', 'compare', 'compareattribute'=>'password', 'on'=>'create'),              array('username', 'length', 'max'=>10),             array('isactive', 'safe'),             // following rule used search().             // @todo please remove attributes should not searched.             array('userid, username, password, isactive, role', 'safe', 'on'=>'search'),         );     } 

and here view code

<div class="form">  <?php $form=$this->beginwidget('cactiveform', array(     'id'=>'variable-form',     'htmloptions'=>array(         'role'=>'form',     ),     'enableajaxvalidation'=>false, )); ?>      ...      <div class="form-group">         <?php echo $form->labelex($model,'password'); ?>         <?php echo $form->passwordfield($model,'password', array('class'=>'form-control input-sm')); ?>         <?php echo $form->passwordfield($model,'repeat_password', array('class'=>'form-control input-sm')); ?>         <?php echo $form->error($model,'password'); ?>     </div>      ...   <?php $this->endwidget(); ?>  </div><!-- form --> 

what problem? please help, new yii. should add new column in database?

it because extends cactiverecord. think in table sys_user not exist column repeat_password. how understand want create form validation, fields , processing. need create custom class , extends form . example form:

class registrationform extends cformmodel {  /**  * @var string  */ public $password;  /**  * @var string  */ public $repeat_password;  /**  * @inheritdoc  */ public function rules() {     return array(         array('password, repeat_password', 'required'),         array('password', 'compare', 'compareattribute' => 'repeat_password'),     );    } }  

how use:

 // in controller      $form = new registrationform();     if (isset($_post['registrationform'])) {         $form->attributes = $_post['registrationform'];         $form->validate();      }     $this->render('registration', array('model' => $form));     //in view     ...     <?php echo $form->passwordfield($model,'password', array('class'=>'form-control input-sm')); ?>     <?php echo $form->error($model,'password'); ?>     <?php echo $form->passwordfield($model,'repeat_password', array('class'=>'form-control input-sm')); ?>     <?php echo $form->error($model,'repeat_password'); ?>     <?php $this->endwidget(); ?>