Yii:用户身份验证不起作用

所以我尝试在 Yii 中登录一个应用程序，它似乎停止在我的站点控制器的验证或登录功能上。它从不登录，从不做任何有用的事情。什么都没有显示，没有错误，nada zip

我在关注：http://www.larryullman.com/2010/01/04/simple-authentication-with-the-yii-framework/

用户身份类：

class UserIdentity extends CUserIdentity
public function authenticate()
{
        $user = User::model()->findByAttributes(array('username'=>$this->username));
        $saltedPW = ""; // null string for salted PW
        if ($user===null) { // No user found!
                $this->errorCode=self::ERROR_USERNAME_INVALID;
        }
        if ($user!==null){
            // salt the user password string then hash
            // incase $user pw is not a salted hash, rather a password string
            $saltedPW = md5(Yii::app()->params["salt"] . $user->password);
            //testing the password 
            if (($user->password !== $this->password) || 
                ($saltedPW       !== $this->password))
            {
                    $this->errorCode=self::ERROR_PASSWORD_INVALID;
            } 
            else 
            {
                    $this->errorCode=self::ERROR_NONE;
            }
        }
    return !$this->errorCode;
    }

}

从站点控制器登录：

public function actionLogin()
{
    $model=new LoginForm;
    // if it is ajax validation request
    if(isset($_POST['ajax']) && $_POST['ajax']==='login-form')
    {
        echo CActiveForm::validate($model);
        Yii::app()->end();
    }
    // collect user input data
    if(isset($_POST['LoginForm']))
    {
        $model->attributes=$_POST['LoginForm'];
        // validate user input and redirect to the previous page if valid
        if($model->validate() && $model->login())
                    {
                        $this->redirect(Yii::app()->user->returnUrl);
                    }
                    else
                    {
                       $this->render('login',array('model'=>$model)); 
                    }
    }
    // display the login form
    $this->render('login',array('model'=>$model));
}

登录表单

class LoginForm extends CFormModel
{
    public $username;
    public $password;
    public $rememberMe;
    private $_identity;
    /**
     * Declares the validation rules.
     * The rules state that username and password are required,
     * and password needs to be authenticated.
     */
    public function rules()
    {
        return array(
            // username and password are required
            array('username, password', 'required'),
            // rememberMe needs to be a boolean
            array('rememberMe', 'boolean'),
            // password needs to be authenticated
            array('password', 'authenticate'),
        );
    }
    /**
     * Declares attribute labels.
     */
    public function attributeLabels()
    {
        return array(
            'rememberMe'=>'Remember me next time',
        );
    }
    /**
     * Authenticates the password.
     * This is the 'authenticate' validator as declared in rules().
     */
    public function authenticate($attribute,$params)
    {
        if(!$this->hasErrors())
        {
            $this->_identity=new UserIdentity($this->username,$this->password);
            if(!$this->_identity->authenticate())
                $this->addError('password','Incorrect username or password.');
        }
    }
    /**
     * Logs in the user using the given username and password in the model.
     * @return boolean whether login is successful
     */
    public function login()
    {
        if($this->_identity===null)
        {
            $this->_identity=new UserIdentity($this->username,$this->password);
            $this->_identity->authenticate();
        }
        if($this->_identity->errorCode===UserIdentity::ERROR_NONE)
        {
            $duration=$this->rememberMe ? 3600*24*30 : 0; // 30 days
            Yii::app()->user->login($this->_identity,$duration);
            return true;
        }
        else
            return false;
    }
}