public function init()
{
parent::init();
$this->addValidator(function (Field $field) {
if (strlen($field->value) && !is_numeric($field->value)) {
$field->addError(Lang::trans('NUMERIC_VALUE'));
} elseif (strlen($field->value) && $field->min && $field->value < $field->min) {
$field->addError(Lang::trans('MIN_VALUE', $field->min));
} elseif (strlen($field->value) && $field->max && $field->value > $field->max) {
$field->addError(Lang::trans('MAX_VALUE', $field->max));
}
});
}
