如何从Xero的API中的发票中获取商品代码？

Question

How can I get an item code from invoices? I'm working on php and I'm trying this
$Code = $invoice->LineItems->ItemCode;

and

$Code = $invoice->LineItems->LineItem->ItemCode;

But that doesn't work. How can I get it then?

Thanks!

Answer 1

A paged request was necessary to get the Item Code field.