TypeError: cannot marshal None unless allow_none is enabled

Question

Hi,
i call method validate invoice with php webservice,
<?php

require_once('konek.php');

require_once('ripcord/ripcord.php');
$common = ripcord::client("$url/xmlrpc/2/common");
$common->version();

$uid = $common->authenticate($db, $username, $password, array());
$models = ripcord::client("$url/xmlrpc/2/object");

$id_invoice = 20; #id invoice

$data = $models->execute_kw($db, $uid, $password,'account.invoice', 'action_invoice_open', [$id_invoice]);

echo json_encode($data);

?>

process is su

Ravi Gadhia · Accepted Answer

it's a known limitation of XML-RPC. XML-RPC does not allow None data type as payload unless you explicitly pass aloow_none but for the back worked compatibility reason odoo didn't enable the nil extension.
So here the issue is either sending data to the server has None value or server return None result.
In most of cases when you call any server method and it didn't return anything then python by default return None. so you have to explicitly return True, False, etc...
so make sure `action_invoi

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