public function rules()
    {
        return array(
            // username and password are required on login
            array('username, password', 'required', "on" => 'login'),
            array('username', 'email', "on" => 'login'),
            // forgotPasswordEmail is required on forgotPassword
            array('forgotPasswordEmail', 'required', "on" => 'forgotPassword'),
            array('forgotPasswordEmail', 'email', "on" => 'forgotPassword'),
            // rememberMe needs to be a boolean
            array('rememberMe', 'boolean'),
            // password needs to be authenticated
            array('password', 'authenticate'),
        );
    }


------------------------------------------------------

public function actionLogin()
{
    $loginFormModel=new LoginForm;
        $invitationRegistrationModel=new InvitationRegistration;

    // if it is ajax validation request
    /*if(isset($_POST['ajax']) && $_POST['ajax']==='login-form')
    {
        echo CActiveForm::validate($model);
        Yii::app()->end();
    }*/

    // collect user input data
    if(isset($_POST['LoginForm']))
    {
            //See if the "Forgot Email" checkbox was checked
        if( isset($_POST['LoginForm']['forgotPassword']) ) {
                $loginFormModel->setScenario('forgotPassword');
                    $loginFormModel->attributes=$_POST['LoginForm'];
                    print_r($loginFormModel->scenario);
                    if( $loginFormModel->validate() )
            {
                        //If the email is validated, see if it is in the database.
                        $user = Users::model()->findByAttributes('email','WHERE email = '.$loginFormModel->forgotPasswordEmail);
                        print_r($user);
                        die();
                        //If it is in the database, change the password for the user to some random string of letters.
                        //Send the new password in an email to the user.
            }

......