... and you see a bunch of "invalid header" in the QML Debugger Console.
Then turn ON the shadow build because the QML live bench tries to deploy our object codes and other building residual files to the target, and in the case if there is a lot it might take a lot of time...

Open your spreadsheed in non-readonly mode (remove setReadDataOnly(true))

1. register a native application at the Microsoft Azure Active directory:
https://portal.azure.com






Make sure you start the redirect url with http://127.0.0.1 not http://localhost! More details here.

3. starting from the reddit example modify your dode with:

auto replyHandler = new QOAuthHttpServerReplyHandler(1337, this);
oauth2.setClientIdentifier("xxxxxx-a90c-494d-808e-3749796ae80f";
oauth2.setReplyHandler(replyHandler);
oauth2.setAuthorizationUrl(QUrl("https://login.microsoftonline.com/common/oauth2/authorize");
oauth2.setAccessTokenUrl(QUrl("https://login.microsoftonline.com/common/oauth2/token");

Make sure that you are exposed the belongsTo entity as an accessible field in the saved entity.

Example:

UnitType belongsTo BaseUnit (src/Model/Table/UnitType.php):

...
public function initialize(array $config)
{
...
$this->belongsTo('BaseUnits', [
'foreignKey' => 'base_unit_id',
'className' => 'Units',
'joinType' => 'INNER'
]);


BaseUnit added as an accessible field in src/Model/Entity/UnitType.php

protected $_accessible = [
'name' => true,
'base_unit_id' => true,
'base_unit' => true,
'created_by' => true,
'modified_by' => true,
'units' => true,
'item_types_attributes' => true,
'items' => true
];


Form:

<?php
echo $this->Form->control('name', ['label' => __('Mennyiségi egység neve (pld. térfogat)']);
?>
<h4><?= __('Alapértelmezett mértékegység' ?></h4>
<?php
echo $this->Form->control('base_unit.name', ['label' => __('Mértékegység neve (pld. liter)']);
echo $this->Form->control('base_unit.short_name', ['label' => __('Mértékegység rövid neve (pld. l)']);
?>


Saved with the following method in the controller:

$unitType = $this->UnitTypes->newEntity();
if ($this->request->is('post') {
$unitType = $this->UnitTypes->patchEntity(
$unitType,
$this->request->getData(),
['associated' => ['BaseUnits']]
);
if ($this->UnitTypes->save($unitType)) {