/**
  * Display a listing of the resource.
  *
  * @return \Illuminate\Http\Response
  */
 public function index(Request $request, $project_id)
 {
     $project_parts = Project_part::where('project_id', $project_id)->orderBy('priority')->get();
     if ($request->ajax()) {
         return $project_parts->toArray();
     }
     return view('admin.project_parts.index', ['project_parts' => $project_parts]);
 }