/**
  *
  * @param Request $request
  * @param Activity $activity
  * @return Response
  */
 public function update(Request $request, Activity $activity)
 {
     // Create an array with the new fields merged
     $data = array_compare($activity->toArray(), $request->only(['name', 'color']));
     $activity->update($data);
     $activity = $this->transform($this->createItem($activity, new ActivityTransformer()))['data'];
     return response($activity, Response::HTTP_OK);
 }