webeno webeno - 3 months ago 26
PHP Question

Yii2: ActiveForm field numeric, length => 8

I'm trying to make yii2 to validate my

ActiveForm
field that should be numeric and of 8 characters long.

Following is what I tried in the default
LoginForm
model of
yii2/advanced/backend
, but unfortunately the
isNumeric
validator simply doesn't kick in:



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.');
}
}
}


I also tried adding a scenario as suggested in a related post (http://stackoverflow.com/a/27817221/2037924) but that only worked (as in displayed the error) if I did not include the
password
field in the scenario.

Is this a good way to achieve this at all, or can you think of a better way of doing it?

Note: the reason I define
username
as
string
is because the numbers may contain leading 0's.

Answer

Read more about the validations here: http://www.yiiframework.com/doc-2.0/guide-tutorial-core-validators.html#number

This works fine for me using the contact form from yii2-basic

/**
 * @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.');
    }
}