protected function __checkAlbumId($album_id)
 {
     if (Album::where('id', $album_id)->count() > 0) {
         return true;
     }
     return false;
 }
 protected function __checkUrl($url)
 {
     if (Album::where('url', $url)->count() == 0) {
         return true;
     }
     return false;
 }