/**
  * Update the specified resource in storage.
  *
  * @param  \Illuminate\Http\Request  $request
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function update(Request $request, Event $event)
 {
     $event->update($request->input());
     $event->calendars()->sync($request->input()['calendars']);
     return redirect()->action('EventsController@index');
 }