purchase_update

public function update(Request $request, $id)
    {
        dd($request);

            $purchase = Purchase::findOrFail($id);
            $purchase['stockID'] = $request->stockID;
            $purchase['supplier_id'] = $request->supplyer_id;
            $purchase['payment_status_id'] = $request->payment_status;
            $purchase['purchase_date'] = $request->purchase_date;
            // dd($purchase);
            $purchase->update();
            $purchase_id = $purchase->id;
            // dd($purchase_id);
              /*----------------delete previous data : Start --------------------*/
            $deleteddata = PurchaseDetails::where('purchase_id', $purchase_id)->delete();
            /*----------------delete previous data END--------------------*/
            // dd($insert_details_array);

            $insert_details_array=array();
            // dd($income_id);
            foreach($request->addmore as $details){
                // $data = new incomes_details();
                $data['purchase_id'] = $purchase_id;
                $data['product_id'] = $details['product_id'];
                $data['purchase_qty'] = $details['quantity'];
                $data['purchaseprice'] = $details['purchaseprice'];
                $totalpurchase = $data['purchaseprice']*$data['purchase_qty'];
                $data['total_amount'] = $totalpurchase;
                $data['created_at'] = now();
                // $product = new Product;
                // $product['id'] = $data['product_id'];
                // $product['AvlQty'] += $data['purchase_qty'];
                // $product->update();
                Product::where('id', $data['product_id'])->decrement('AvlQty',$data['purchase_qty']);
                $insert_details_array[]=$data;
                // dd($data);
                unset($data);
            }
            // dd($getqty);
            // dd($product);

            if($insert_details_array)
            {

                PurchaseDetails::insert($insert_details_array);

            }

            return redirect()->back();

    }