Yii2: how to use custom validation function for activeform?

Question

In my form\'s model, I have a custom validation function for a field defined in this way

class SignupForm extends Model
{
    public function rules()
    {
          


        

Answer 1

I had common problem.

In your validation function:

public function checkDateFormat($attribute, $params)
    {
        // no real check at the moment to be sure that the error is triggered
        $this->addError($attribute, Yii::t('user', 'You entered an invalid date format.'));
    }

$params doesn`t get any value at all. It actually always equals to Null. You have to check for your attribute value in function:

public function checkDateFormat($attribute, $params)
{
    if($this->birth_date == False)
    {
        $this->addError($attribute, Yii::t('user', 'You entered an invalid date format.'));
    }
}

that`s how it worked for me.