public function export($id)
 {
     $ratings = Rating::withTrashed()->where('lesson_id', '=', $id)->get();
     //dd($ratings);
     Excel::create('ratings', function ($excel) use($ratings) {
         $excel->sheet('Sheet 1', function ($sheet) use($ratings) {
             $sheet->fromArray($ratings);
         });
     })->export('xls');
 }
 public function toggleDelete($id)
 {
     /** @var Rating $rating */
     $rating = Rating::withTrashed()->where('id', '=', $id)->first();
     if ($rating->trashed()) {
         $rating->restore();
     } else {
         $rating->delete();
     }
 }