public static function onValidUpdate(&$input, $newErrors) {
		// Don't care about some errors, other fields should be updated.
		$found = 0;
		foreach( $input as $fieldname => $fieldvalue ) {
			if( in_array($fieldname, static::$fields) ) {
				$found++;
			}
		}
		if( $found ) {
			static::fillLogEvent($input, 'edit');
			static::fillLogEvent($input, 'update');
		}
		return $found ? true : false;
	}