/**
  * Action: Delete resource images
  * @return Response
  */
 public function deleteUpload($id)
 {
     // Only allows you to share pictures on the cover of the current resource being deleted
     $filename = TravelPictures::where('id', $id)->where('user_id', Auth::user()->id)->first();
     $oldImage = $filename->filename;
     $model = $this->model->find($filename->travel_id);
     $oldThumbnails = $model->thumbnails;
     if (is_null($filename)) {
         return Redirect::back()->with('error', '没有找到对应的图片');
     } elseif ($filename->delete()) {
         destoryUploadImages($this->destinationPath, $oldImage);
         if ($oldImage == $oldThumbnails) {
             $model->thumbnails = NULL;
             $model->save();
             destoryUploadImages($this->largeThumbnailsPath, $oldThumbnails);
             destoryUploadImages($this->smallThumbnailsPath, $oldThumbnails);
         }
         return Redirect::back()->with('success', '图片删除成功。');
     } else {
         return Redirect::back()->with('warning', '图片删除失败。');
     }
 }
 /**
  * Action: Delete resource images
  * @return Response
  */
 public function deleteUpload($id)
 {
     // Only allows you to share pictures on the cover of the current resource being deleted
     $filename = TravelPictures::where('id', $id)->where('user_id', Auth::user()->id)->first();
     $oldImage = $filename->filename;
     if (is_null($filename)) {
         return Redirect::back()->with('error', '没有找到对应的图片');
     } elseif ($filename->delete()) {
         File::delete(public_path('uploads/travel/' . $oldImage));
         return Redirect::back()->with('success', '图片删除成功。');
     } else {
         return Redirect::back()->with('warning', '图片删除失败。');
     }
 }