public function postAddToCart(Request $request)
{
$id = $request->has('producto_id') ? $request->producto_id : 0;
$quantity = $request->has('quantity') ? $request->quantity : 1;
$prod = \App\Models\Producto::cart($id)->toArray();
$prod = array_add($prod, 'task', 0);
$prod = array_add($prod, 'quantity', $quantity);
\Cart::insert($prod);
return redirect()->route('cart.detail');
}