error: Call to a member function validatePassword(

问题:

I'm new in this framework actually this is my first time to use framework. Can someone help me on this error I don't know how to fixed this error. here is my code:

User.php:

<?php

namespace app\models;
use Yii;
class User extends  \yii\db\ActiveRecord implements \yii\web\IdentityInterface
{
    public $id;
    public $username;
    public $password;
    public $authKey;
    public $accessToken;

   public static function tableName()
    {
        return 'user_file';
    }


    /**
     * @inheritdoc
     */
    public static function findIdentity($id)
    {
        return isset(self::$users[$id]) ? new static(self::$users[$id]) : null;
    }

    /**
     * @inheritdoc
     */
    public static function findIdentityByAccessToken($token, $type = null)
    {
        foreach (self::$users as $user) {
            if ($user['accessToken'] === $token) {
                return new static($user);
            }
        }

        return null;
    }

    /**
     * Finds user by username
     *
     * @param  string      $username
     * @return static|null
     */
    public static function findByUsername($username)
    {
        $user = User::find()
        ->where(['usr_id' => $username])
    ->all();

        return $user;
    }

    /**
     * @inheritdoc
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @inheritdoc
     */
    public function getAuthKey()
    {
        return $this->authKey;
    }

    /**
     * @inheritdoc
     */
    public function validateAuthKey($authKey)
    {
        return $this->authKey === $authKey;
    }

    /**
     * Validates password
     *
     * @param  string  $password password to validate
     * @return boolean if password provided is valid for current user
     */
    public function validatePassword($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;
    }
}

Is my User.php code is correct? I really don't know the problem with my code can someone explain me what's happening?

回答1:

According to http://www.yiiframework.com/doc-2.0/yii-db-activequery.html#all()-detail all() returns an array. In findByUsername() you are returning this array. This is why you getting the call to missing member function error since an array is not an object. Try returning ->one() instead of all() like:

public static function findByUsername($username)
{
    $user = User::find()
    ->where(['usr_id' => $username])
->one();

    return $user;
}

回答2:

Use $user = new User(); insted of $user = $this->getUser(); and call to method as $user->getUser() in your validatePassword() method in the LoginForm.php

回答3:

You are doing -

$user = $this->getUser();

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

Which is setting $user from -

public function getUser()
{
    if ($this->_user === false) {
        $this->_user = User::findByUsername($this->username);
    }

    return $this->_user;
}

Where findByUsername() is a method of class Model. In that case $user is not the instance of User class.

Try with -

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