Call to a member function validatePassword() on a non-object

what causes this error




     *

     * @param string $attribute the attribute currently being validated

     * @param array $params the additional name-value pairs given in the rule

     */

    public function validatePassword($attribute, $params)

    {

        if (!$this->hasErrors()) {

            $user = $this->getUser();

 

            if (!$user || !$user->validatePassword($this->password)) { //Line 46

                $this->addError($attribute, 'Incorrect username or password.');

            }

        }

    }

 

    /**

     * Logs in a user using the provided username and password.

     * @return boolean whether the user is logged in successfully

     */



model/LoginForm.php




<?php


namespace app\models;


use Yii;

use yii\base\Model;


/**

 * LoginForm is the model behind the login form.

 */

class LoginForm extends Model

{

    public $username;

    public $password;

    public $rememberMe = true;


    private $_user = false;


    /**

     * @return array the validation rules.

     */

    public function rules()

    {

        return [

            // username and password are both required

            [['username', 'password'], 'required'],

            // rememberMe must be a boolean value

            ['rememberMe', 'boolean'],

            // password is validated by validatePassword()

            ['password', 'validatePassword'],

        ];

    }


    /**

     * Validates the password.

     * This method serves as the inline validation for password.

     *

     * @param string $attribute the attribute currently being validated

     * @param array $params the additional name-value pairs given in the rule

     */

    public function validatePassword($attribute, $params)

    {

        if (!$this->hasErrors()) {

            $user = $this->getUser();


            if (!$user || !$user->validatePassword($this->password)) {

                $this->addError($attribute, 'Incorrect username or password.');

            }

        }

    }


    /**

     * Logs in a user using the provided username and password.

     * @return boolean whether the user is logged in successfully

     */

    public function login()

    {

        if ($this->validate()) {

            return Yii::$app->user->login($this->username, $this->rememberMe ? 3600*24*30 : 0);

        } else {

            return false;

        }

    }


    /**

     * Finds user by [[username]]

     *

     * @return User|null

     */

    public function getUser()

    {

        if ($this->username === false) {

            $this->username = User::findByUsername($this->username);

        }


        return $this->username;

    }

}






model/User.php




<?php


namespace app\models;


use Yii;

use \yii\db\ActiveRecord;

use \yii\web\IdentityInterface;


/**

 * This is the model class for table "user".

 *

 * @property integer $id

 * @property string $username

 * @property string $password

 */

class User extends ActiveRecord implements  IdentityInterface

{

    /**

     * @inheritdoc

     */

    public static function tableName()

    {

        return 'user';

    }


    /**

     * @inheritdoc

     */

    public function rules()

    {

        return [

            [['username', 'password'], 'required'],

            [['username', 'password'], 'string', 'max' => 50]

        ];

    }


    /**

     * @inheritdoc

     */

    public function attributeLabels()

    {

        return [

            'id' => 'ID',

            'username' => 'Usernames',

            'password' => 'Passwords',

        ];

    }


    public static function findIdentity($id)

    {

        return static::findOne($id);

    }


    /**

     * Finds an identity by the given token.

     *

     * @param string $token the token to be looked for

     * @return IdentityInterface|null the identity object that matches the given token.

     */

    public static function findIdentityByAccessToken($token, $type = null)

    {

        return static::findOne(['access_token' => $token]);

    }


    /**

     * @return int|string current user ID

     */

    public function getId()

    {

        return $this->id;

    }


    /**

     * @return string current user auth key

     */

    public function getAuthKey()

    {

        return $this->auth_key;

    }


    /**

     * @param string $authKey

     * @return boolean if auth key is valid for current user

     */

    public function validateAuthKey($authKey)

    {

        return $this->getAuthKey() === $authKey;

    }







    public static function findByUsername($username)

    {

        /*foreach (self::$users as $user) {

            if (strcasecmp($user['username'], $username) === 0) {

                return new static($user);

            }

        }*/


        $user = User::find()->where(['username' => $username])->one();


        return $user;

    }


    public function validatePassword($password)

    {

        return $this->password === $password;

    }


}






views/login.php




<?php

use yii\helpers\Html;

use yii\bootstrap\ActiveForm;


/* @var $this yii\web\View */

/* @var $form yii\bootstrap\ActiveForm */

/* @var $model app\models\LoginForm */


$this->title = 'Login';

$this->params['breadcrumbs'][] = $this->title;

?>

<div class="site-login">

    <h1><?= Html::encode($this->title) ?></h1>


    <p>Please fill out the following fields to login:</p>


    <?php $form = ActiveForm::begin([

        'id' => 'login-form',

        'options' => ['class' => 'form-horizontal'],

        'fieldConfig' => [

            'template' => "{label}\n<div class=\"col-lg-3\">{input}</div>\n<div class=\"col-lg-8\">{error}</div>",

            'labelOptions' => ['class' => 'col-lg-1 control-label'],

        ],

    ]); ?>


    <?= $form->field($model, 'username') ?>


    <?= $form->field($model, 'password')->passwordInput() ?>


    <?= $form->field($model, 'rememberMe', [

        'template' => "<div class=\"col-lg-offset-1 col-lg-3\">{input}</div>\n<div class=\"col-lg-8\">{error}</div>",

    ])->checkbox() ?>


    <div class="form-group">

        <div class="col-lg-offset-1 col-lg-11">

            <?= Html::submitButton('Login', ['class' => 'btn btn-primary', 'name' => 'login-button']) ?>

        </div>

    </div>


    <?php ActiveForm::end(); ?>


    <div class="col-lg-offset-1" style="color:#999;">

        You may login with <strong>admin/admin</strong> or <strong>demo/demo</strong>.<br>

        To modify the username/password, please check out the code <code>app\models\User::$users</code>.

    </div>

</div>






here




public function getUser()

    {

        if ($this->username === false) {

            $this->username = User::findByUsername($this->username);

        }


        return $this->username;

    }



you return $username (string) not user object

Okay I changed It now.

but I could Not Login is there somehting wrong with my User.php




<?php


namespace app\models;


use Yii;

use \yii\db\ActiveRecord;

use \yii\web\IdentityInterface;


/**

 * This is the model class for table "user".

 *

 * @property integer $id

 * @property string $username

 * @property string $password

 */

class User extends ActiveRecord implements IdentityInterface

{

    /**

     * @inheritdoc

     */

    public $id;

    public $username;

    public $password;


    public static function tableName()

    {

        return 'user';

    }


    /**

     * @inheritdoc

     */

    public function rules()

    {

        return [

            [['username', 'password'], 'required'],

            [['username', 'password'], 'string', 'max' => 50]

        ];

    }


    /**

     * @inheritdoc

     */

    public function attributeLabels()

    {

        return [

            'id' => 'ID',

            'username' => 'Username',

            'password' => 'Password',

        ];

    }


    public static function findIdentity($id)

    {

        return static::findOne($id);

    }


    /**

     * Finds an identity by the given token.

     *

     * @param string $token the token to be looked for

     * @return IdentityInterface|null the identity object that matches the given token.

     */

    public static function findIdentityByAccessToken($token, $type = null)

    {

        return static::findOne(['access_token' => $token]);

    }


    /**

     * @return int|string current user ID

     */

    public function getId()

    {

        return $this->id;

    }


    /**

     * @return string current user auth key

     */

    public function getAuthKey()

    {

        return $this->auth_key;

    }


    /**

     * @param string $authKey

     * @return boolean if auth key is valid for current user

     */

    public function validateAuthKey($authKey)

    {

        return $this->getAuthKey() === $authKey;

    }







    public static function findByUsername($username)

    {

        /*foreach (self::$users as $user) {

            if (strcasecmp($user['username'], $username) === 0) {

                return new static($user);

            }

        }*/


        $user = User::find()->where(['username' => $username])->one();


        return $user;

    }


    public function validatePassword($password)

    {

        return  $this->password === $password;

    }


}






LoginForm.php




<?php


namespace app\models;


use Yii;

use yii\base\Model;


/**

 * LoginForm is the model behind the login form.

 */

class LoginForm extends Model

{

    public $username;

    public $password;

    public $rememberMe = true;


    private $_user = false;


    /**

     * @return array the validation rules.

     */

    public function rules()

    {

        return [

            // username and password are both required

            [['username', 'password'], 'required'],

            // rememberMe must be a boolean value

            ['rememberMe', 'boolean'],

            // password is validated by validatePassword()

            ['password', 'validatePassword'],

        ];

    }


    /**

     * Validates the password.

     * This method serves as the inline validation for password.

     *

     * @param string $attribute the attribute currently being validated

     * @param array $params the additional name-value pairs given in the rule

     */

    public function validatePassword($attribute, $params)

    {

        if (!$this->hasErrors()) {

            $user = $this->getUser();




            if (!$user || !$user->validatePassword($this->password)) {

                $this->addError($attribute, 'Incorrect username or password.');

            }

        }

    }


    /**

     * Logs in a user using the provided username and password.

     * @return boolean whether the user is logged in successfully

     */

    public function login()

    {

        if ($this->validate()) {

            return Yii::$app->user->login($this->getUser(), $this->rememberMe ? 3600*24*30 : 0);

        } else {

            return false;

        }

    }


    /**

     * Finds user by [[username]]

     *

     * @return User|null

     */

    public function getUser()

    {

        if ($this->_user === false) {

            $this->_user = User::findByUsername($this->username);

        }


        return $this->_user;

    }

}






did you look what is returned by getUser(), $user->password and $password?