app\models\Comment::user PHP Метод

    public function user()
    {
        return $this->belongsTo(User::class, 'fk_user_id', 'id');
    }

 /**
  * Store a newly created resource in storage.
  *
  * @param  \Illuminate\Http\Request  $request
  * @return \Illuminate\Http\Response
  */
 public function store(Request $request, $id)
 {
     $user = auth()->check() ? auth()->user() : null;
     $xhr = $request->ajax();
     if (is_null($user)) {
         return $xhr ? "Not logged in" : redirect()->back()->with('error', 'Not logged in');
     }
     if (!$request->has('comment')) {
         return $xhr ? "You need to enter a comment" : redirect()->back()->with('error', 'You need to enter a comment');
     }
     if (mb_strlen(trim($request->get('comment'))) > 1000) {
         return $xhr ? "Comment to long" : redirect()->back()->with('error', 'Comment to long');
     }
     $video = Video::findOrFail($id);
     $com = new Comment();
     $com->content = trim($request->get('comment'));
     $com->user()->associate($user);
     $com->video()->associate($video);
     $com->save();
     $sent = [];
     foreach ($com->getMentioned() as $mentioned) {
         Message::send($user->id, $mentioned->id, $user->username . ' mentioned you in a comment', view('messages.commentmention', ['video' => $video, 'user' => $user, 'comment' => $com]));
         $sent[] = $mentioned;
     }
     foreach ($com->answered() as $answered) {
         if (array_search($answered, $sent) !== false) {
             continue;
         }
         Message::send($user->id, $answered->id, $user->username . ' answered on your comment', view('messages.commentanswer', ['video' => $video, 'user' => $user, 'comment' => $com]));
         $sent[] = $answered;
     }
     if ($user->id != $video->user->id) {
         if (array_search($video->user, $sent) === false) {
             Message::send($user->id, $video->user->id, $user->username . ' commented on your video', view('messages.videocomment', ['video' => $video, 'user' => $user, 'comment' => $com]));
         }
     }
     return $xhr ? view('partials.comment', ['comment' => $com, 'mod' => $user->can('delete_comment')]) : redirect()->back()->with('success', 'Comment successfully saved');
 }