public function save_shelf()
 {
     $id = Input::get('id');
     $store_id = Input::get('store_id');
     $department_id = Input::get('department_id');
     $shelf = Shelf::find($id);
     if (!$shelf) {
         $shelf = new Shelf();
     }
     $shelf->name = Input::get('name');
     $shelf->store_id = $store_id;
     $shelf->department_id = $department_id;
     $shelf->save();
     $message = "Successfully updated the shelf";
     $type = "success";
     return Redirect::to('/admin/store/' . $store_id . '/department/' . $department_id . '/shelves')->with('type', $type)->with('message', $message);
 }