function ajax_postComment(Request $request)
 {
     if (!$request->ajax()) {
         return;
     }
     $data = $request->all();
     $comment = new Comment();
     $comment->user_id = Auth::user()->id;
     $comment->production_id = $data[Comment::ATTR_PRODUCTION_ID];
     $comment->content = Util::removeURLsFromText(strip_tags($data[Comment::ATTR_CONTENT]), "[Enlace bloqueado]");
     $comment->created_at = DateUtil::getCurrentTime();
     $comment->save();
     return json_encode(array("content" => $comment->content));
 }