public function storeProductsOnDiscountOrdering(StoreOrderedProducts $request): RedirectResponse 	{ 		DiscountProductOrderitem::truncate();  		foreach ($request->order as $key => $value) { 			DiscountProductOrderItem::create([ 				'product_id' => $value, 				'sort_number' => $key + 1, 			]); 		}  		return $this->redirectFromSave('discounts.items-under-discount'); 	}