/**
  * Display a listing of the resource.
  *
  * @param Request $request
  *
  * @return \Illuminate\Http\Response
  */
 public function index(Request $request)
 {
     $products = Product::select(['products.id', 'products.name', 'products.image', 'products.active', 'products.position', 'products_categories.name as category'])->join('products_categories', 'products_categories.id', '=', 'products.categoryId');
     return Datatables::of($products)->addColumn('active', function ($product) {
         return $product->active ? '<i class="fa fa-check-square-o"></i>' : '<i class="fa fa-square-o"></i>';
     })->make(true);
 }