Yii2：ActiveForm字段數字，長度=> 8

Question

我試圖讓yii2來驗證我的ActiveForm字段應該是數字和8個字符長。

下面是我試過在yii2/advanced/backend默認LoginForm模式，但不幸的是，isNumeric驗證只需在不踢：

public function rules() 
{ 
    return [ 
     // username and password are both required 
     [['username', 'password'], 'required'], 
     // username should be numeric 
     ['username', 'isNumeric'], 
     // username should be numeric 
     ['username', 'string', 'length'=>8], 
     // password is validated by validatePassword() 
     ['password', 'validatePassword'], 
    ]; 
} 

/** 
* Validates if the username is numeric. 
* This method serves as the inline validation for username. 
* 
* @param string $attribute the attribute currently being validated 
* @param array $params the additional name-value pairs given in the rule 
*/ 
public function isNumeric($attribute, $params) 
{ 
    if (!is_numeric($this->username)) 
     $this->addError($attribute, Yii::t('app', '{attribute} must be numeric', ['{attribute}'=>$attribute])); 
} 

/** 
* 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.'); 
     } 
    } 
} 

我也嘗試添加的場景作爲一個建議（https://stackoverflow.com/a/27817221/2037924），但只有在該場景中沒有包含password字段的情況下才起作用（如顯示錯誤）。

這是一個很好的方法來實現這一點，或者你能想出一個更好的方法嗎？

注：我定義username爲string的原因是因爲數字可能包含前導0。

Answer 1

瞭解更多關於這裏的驗證：http://www.yiiframework.com/doc-2.0/guide-tutorial-core-validators.html#number

這種利用yii2-基本的聯繫方式工作正常，我

/** 
* @return array the validation rules. 
*/ 
public function rules() 
{ 
    return [ 
     // name, email, subject and body are required 
     [['name', 'email', 'subject', 'body'], 'required'], 
     // email has to be a valid email address 
     ['email', 'email'], 
     ['subject', 'is8NumbersOnly'], 
     // verifyCode needs to be entered correctly 
     ['verifyCode', 'captcha'], 
    ]; 
} 

public function is8NumbersOnly($attribute) 
{ 
    if (!preg_match('/^[0-9]{8}$/', $this->$attribute)) { 
     $this->addError($attribute, 'must contain exactly 8 digits.'); 
    } 
} 

Answer 2

與integer數據類型嘗試：

[['username'], 'integer'], 
[['username'], 'string', 'min' => 8], 

它將同時驗證numeric和length。這將做到這一點。

Answer 3

public function rules() 
{ 
    return [ 
     // username should be numeric 
     ['username', 'match', 'pattern' => '/^\d{8}$/', 'message' => 'Field must contain exactly 8 digits.], 

     // ... 
    ]; 
}