如何在yii框架中使用登录表单进行身份验证

Question

您好朋友，我是yii框架的初学者，我想创建带有身份验证的登录表单，但是我遇到此错误：

致命错误：在第47行的C：\\ xampp \\ htdocs \\ pro_c \\ protected \\ components \\ UserIdentity.php中调用未定义的方法User :: model（）

UserIdentity.php

    public function authenticate()
    {


    $users = User::model()->findByAttributes(array('username'=>$this->username));


            if(!isset($users[$this->username]))
                    $this->errorCode=self::ERROR_USERNAME_INVALID;
            elseif($users[$this->username]!==$this->password)
                    $this->errorCode=self::ERROR_PASSWORD_INVALID;
            else
                    $this->errorCode=self::ERROR_NONE;
            return !$this->errorCode;
      }
   }

    ?>

UserController.php

    class UserController extends Controller
    {

    public function actionIndex()
    {
            // renders the view file 'protected/views/site/index.php'
            // using the default layout 'protected/views/layouts/main.php'
            $this->render('index');
    }


    public function actionLogin()
    {
            $model=new User;


            if(isset($_POST['User']))
            {
                    $model->attributes=$_POST['User'];
                    // validate user input and redirect to the previous page if valid
                    if($model->validate() && $model->login())
                            $this->redirect(Yii::app()->user->returnUrl);
            }
            // display the login form
            $this->render('login',array('model'=>$model));
    }


    public function actionLogout()
    {
            Yii::app()->user->logout();
            $this->redirect(Yii::app()->homeUrl);
    }
   }
  ?>

user.php的

    /**
      * LoginForm class.
      * LoginForm is the data structure for keeping
      * user login form data. It is used by the 'login' action of 'SiteController'.
      */
    class User 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;
    }
   }
  ?>

---

当我在UserIdentity中使用此代码时

    $users=array(
        // username => password
        'demo'=>'demo',
        'admin'=>'admin',

    );

返回true，但是当我使用

     $users = Pi::model()->findByAttributes(array('username'=>$this->username));

给我这个错误

     Fatal error: Call to undefined method Pi::model() in C:\xampp\htdocs\pro_c\protected\components\UserIdentity.php on line 47

请帮我

Answer 1

好吧，您有一个名为User的模型，该模型的类型为CFormModel（它是一个表单模型）。 但是，您试图访问用于CActiveModel类型的User :: model（）-> findByAttributes（数据库模型）。 您应该将您的类User重命名为其他名称。 例如，在这里，您的User类称为UserIdentity。 http://www.yiiframework.com/doc/guide/1.1/en/topics.auth

您必须对代码进行相当多的更改才能起作用。 只需查看Yii博客演示，即可正确入门。

Answer 2

您的代码似乎在正确的路径上，但是Yii似乎无法找到User类。

您可以手动导入该类，或者更好的是，使用protected / config / main文件中的“ import”指令自动加载该类。

这告诉yii将所有模型加载到protected / models /目录中，假设这是User.php类文件所在的位置。

// autoloading model and component classes
'import'=>array(
    'application.models.*',
    'application.components.*',
),