Yii2模型规则的临时验证变量

Question

I want to validate that title_clean is unique and can be used as an identifier for URL's. But it is just an temporary instance of the real public variable that is given through the input (REST here).

So I tried it with the following:

public $title;
public $title_clean // not set through a form it shall be temporary

public function rules()
{
    return [
        ['title_clean', 'default', 'value' => $this->title],
        ['title_clean', 'clean'],
        ['title_clean', 'unique', 'targetClass' => 'Jobs', 'targetAttribute' => 'title_clean', 'message' => 'The title was already taken.'],
        [...]
    ];
}

 /**
 * Cleaning Method
 *
 * @return mixed|string
 */
private function clean()
{
    $args = func_get_args();
    foreach($args as $string) {
        $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
        $specials = array("/ä/","/ö/","/ü/","/Ä/","/Ö/","/Ü/","/ß/");
        $replace = array("ae","oe","ue","Ae","Oe","Ue","ss");
        if (empty($clean)) {
            $clean = preg_replace('/[^A-Za-z0-9\-]/', '', preg_replace($specials, $replace, $string));
        } else {
            $clean .= preg_replace('/[^A-Za-z0-9\-]/', '', preg_replace($specials, $replace, $string));
        }
    }
    return $clean; // Removes special chars.
}

but it does not validate neither throw out an error. Does anyone has an idea about it?

Answer 1

The inline validation is your problem. According to documentation for your second rule you would need a validating method like this:

public function clean($attribute, $params)
{
    $this->$attribute = self::do_the_clean_up_things($value);
}

and the clean method:

private static function do_the_clean_up_things($string)
{
    $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
    $specials = array("/ä/","/ö/","/ü/","/Ä/","/Ö/","/Ü/","/ß/");
    $replace = array("ae","oe","ue","Ae","Oe","Ue","ss");
    return preg_replace('/[^A-Za-z0-9\-]/', '', preg_replace($specials, $replace, $string));
}

Untested. I hope this is correct.