/**
  * Update the specified resource in storage.
  *
  * @param  Request  $request
  * @param  int  $id
  * @return Response
  */
 public function update(Request $request, \App\Menu $menu, \App\Category $category)
 {
     $validation = \Validator::make($request->all(), ['name' => 'min:3']);
     if ($validation->fails()) {
         return response($validation->errors()->all(), 400);
     }
     if ($category->accessable($menu)) {
         $category->update($request->all());
         $category->savePhoto($request->file('photo'));
         return $category;
     }
 }