php - Laravel Get newly inserted id from a relationship on save -

i have morphmany relationship comments related question model know how newly inserted id when saving new comment model.

    public function postcomment() {      if(request::ajax() && auth::check()) {         //input::merge(array_map('trim', input::all()));          $comment = new comment;         $comment->user_id = auth::user()->id;         $comment->body = helper::strip_tags(input::get('body'));         $question_id = input::get('question_id');         $question = question::find($question_id);          // here in if statement how newly created id of comment         if($question->comments()->save($comment)) {                       return response::json(array('success' => true, 'body' => input::get('body'),                  'userlink' => html::linkroute('profile', auth::user()->username, array('id' => auth::user()->id)), 'date' => date("f j, y, g:i a") ));         } else {             return response::json(array('success' => false, 'body' => input::get('body')));         }                } } 

the saved comment record returned on save:

$comment = $question->comments()->save($comment);  if($comment) {     // comment saved      $comment->id; } else {     // comment not saved }