public function getComments()
 {
     $data = json_decode(urldecode(base64_decode(Input::get('data'))));
     $data = $data->data;
     //$data is a jason object with data as keyword
     $post = linkpreview::findOrFail($data->id);
     //$comments=array();
     $comments = comments::where('linkId', '=', $post->id)->get();
     //return collect($post->getComments()) ;
     //foreach($post->getComments()  as $comment)
     //	$comments[]=$comment;
     return $comments;
 }