Yii Framework: Why does "Error 500 Property "CEmailValidator.0" is not defined" appear?

Question

Yii

Friends, I just can't understand why the page shows "Error 500
Property "CEmailValidator.0" is not defined." It seems to me that it's not about the view, because I tried to create a form using CHtml, this error still comes out.
modelka:

class User extends CActiveRecord
{
    const SCENARIO_REGISTER = 'register';

    public $password_repeat;

    /**
     * @return string the associated database table name
     */
    public function tableName()
    {
        return 'user';
    }

    /**
     * @return array validation rules for model attributes.
     */
    public function rules()
    {
        // NOTE: you should only define rules for those attributes that
        // will receive user inputs.
        return array(
            array('username, password, cookie', 'required'),
            array('username', 'unique'),
            array('username', 'length', 'min'=>5, 'max'=>30),
            array('username', 'match', 'pattern'=>'/^[A-z][\w]+$/'),
            array('password', 'length', 'min'=>6, 'max'=>30),
            array('password_repeat', 'email', 'required', 'on'=>self::SCENARIO_REGISTER),
            array('password_repeat', 'length', 'min'=>6, 'max'=>30),
            array('password', 'compare', 'compareAttribute'=>'password_repeat', 'on'=>self::SCENARIO_REGISTER),
            array('email', 'email', 'on'=>self::SCENARIO_REGISTER),
            array('email', 'length', 'min'=>6, 'max'=>30),
            array('email', 'filter', 'filter'=>'mb_strtolower'),
            array('id, username, password, email, dtime_register, cookie', 'safe', 'on'=>'search'),

        );
    }

    /**
     * @return array relational rules.
     */
    public function relations()
    {
        // NOTE: you may need to adjust the relation name and the related
        // class name for the relations automatically generated below.
        return array(
        );
    }

    /**
     * @return array customized attribute labels (name=>label)
     */
    public function attributeLabels()
    {
        return array(
            'username' => 'Username',
            'password' => 'Password',
            'password_repeat' => 'Repeat password',
            'email' => 'Email',
        );
    }

    /**
     * Retrieves a list of models based on the current search/filter conditions.
     *
     * Typical usecase:
     * - Initialize the model fields with values from filter form.
     * - Execute this method to get CActiveDataProvider instance which will filter
     * models according to data in model fields.
     * - Pass data provider to CGridView, CListView or any similar widget.
     *
     * @return CActiveDataProvider the data provider that can return the models
     * based on the search/filter conditions.
     */
    public function search()
    {
        // @todo Please modify the following code to remove attributes that should not be searched.

        $criteria=new CDbCriteria;

        $criteria->compare('id',$this->id);
        $criteria->compare('username',$this->username,true);
        $criteria->compare('password',$this->password,true);
        $criteria->compare('email',$this->email,true);
        $criteria->compare('dtime_register',$this->dtime_register,true);
        $criteria->compare('cookie',$this->cookie,true);

        return new CActiveDataProvider($this, array(
            'criteria'=>$criteria,
        ));
    }

    /**
     * Returns the static model of the specified AR class.
     * Please note that you should have this exact method in all your CActiveRecord descendants!
     * @param string $className active record class name.
     * @return User the static model class
     */
    public static function model($className=__CLASS__)
    {
        return parent::model($className);
    }

    protected function beforeSave() {
        if(parent::beforeSave()) {
            if($this->getIsNewRecord()) {
                $this->dtime_register = time();
                $this->password = $this->hashPassword($this->password);
            }

            return true;
        }

        return false;
    }

    public function hashPassword($password) {
        return md5($password);
    }
}

method in controller:

public function actionRegister() {

        $user = new User(User::SCENARIO_REGISTER);

        if(isset($_POST['User'])) {
            $user->attributes = $_POST['User'];

            if($user->validate()) {
                $user->save(false);

                $this->redirect($this->createUrl('user/'));
            }
        }

        $this->render('register', array('model'=>$user));
    }

and a view:

<div class="form">
    <? $form = $this->beginWidget('CActiveForm', array(
        'id'=>'register-form',
        'enableClientValidation'=>true,
        'clientOptions'=>array(
            'validateOnSubmit'=>true,
        ),
    )); ?>

    <div class="row">
        <? echo $form->labelEx($model, 'username'); ?>
        <? echo $form->textField($model, 'username'); ?>
        <? echo $form->error($model, 'username');?>
    </div>

    <div class="row">
        <? echo $form->labelEx($model, 'email'); ?>
        <? echo $form->textField($model, 'email'); ?>
        <? echo $form->error($model, 'email');?>
    </div>

    <div class="row">
        <? echo $form->labelEx($model, 'password'); ?>
        <? echo $form->textField($model, 'password'); ?>
        <? echo $form->error($model, 'password');?>
    </div>

    <div class="row">
        <? echo $form->labelEx($model, 'password_repeat'); ?>
        <? echo $form->textField($model, 'password_repeat'); ?>
        <? echo $form->error($model, 'password_repeat');?>
    </div>

    <div class="row submit">
        <? echo CHtml::submitButton("Зарегистрироваться");?>
    </div>

<? $this->endWidget(); ?>
</div>

Answer 1

The thing is in this line:
A couple of extra quotes turns the field name into a validator :)