Laravel -request fails mySQL update

The question is this: There is a table with forms in each row. Created with dataTables:

{
    "data": null,
    "targets": -1,
    "defaultContent": "<form action='start-data-submit'> <input  name=\"prod_barcode\" />"
},
{
    "data": null,
    "targets": -1,
    "defaultContent": " <input name=\"prod_quantity\"/>"
},
{
    "data": null,
    "targets": -1,
    "defaultContent": " <input name=\"prod_price\" />"
},
{
    "data": "id",
    "visible": false,
    "searchable": false
},
{
    "data": "updated_at",
    "visible": false,
    "searchable": false
},
{
    "data": null,
    "defaultContent": " <button name=\"submit\" >Update</button> </form>"
}

on click in the form, the following is processed:

$('#start-data tbody').on('click', 'button', function () { //click update
            var row = $(this).closest('tr');
            var data = table.row(row).data().id;
            var info = table.row(row).$("input[name='prod_barcode']").val();
            var infoq = table.row(row).$("input[name='prod_quantity']").val();
            var infop = table.row(row).$("input[name='prod_price']").val();
            var url = "start-data-submit/" + "id=" + data + "&prod_barcode=" + info + "&prod_quantity=" + infoq + "&prod_price=" + infop + " ";
            $(location).attr('href', url);

route:

Route::get('start-data-submit/{id}&{prod_barcode}&{prod_quantity}&{prod_price}','StartDataController@update')

controller:

 public function prodview(Request $request)
    {
        $timestamps = Carbon::today();
        $prod_barcode = $request->route('prod_barcode');
        $prod_quantity = $request->route('prod_quantity');
        $prod_price = $request->route('prod_price');
        $uid = $request->route('id');

        DB::table('products')
            ->where('id', $uid)
            ->update(
                [
                    'updated_at' => $timestamps,
                    'prod_barcode' => $prod_barcode,
                    'prod_quantity' => $prod_quantity,
                    'prod_price' => $prod_price
                ]
            );
    }

It seems that everything is visible - the variables have the necessary values, but update does not happen, it does not give an error.

var_dump($timestamps,$prod_barcode,$prod_quantity,$prod_price,$uid);

issues:

object(Carbon\Carbon)#344 (3) { ["date"]=> string(26) "2020-07-17 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } string(14) "prod_barcode=2" string(15) "prod_quantity=4" string(13) "prod_price=78" string(7) "id=4680"

where else to dig? Any ideas would be very grateful.

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