Critical: Checkbox keeps set even if unset/unchecked

[mvorisek]

Test code:

<?php

require __DIR__ . '/vendor/autoload.php';

$app = new \atk4\ui\App('My App');
$app->initLayout('Admin');

/* @var $form \atk4\ui\Form */
$form = $app->add('Form');
$form->addField('purge_missing', ['CheckBox']);
$form->buttonSave->set('Import');

$form->onSubmit(function(\atk4\ui\Form $form) {
    throw new \Exception($form->model['purge_missing']);
});

If the form is just send, the $form->model['purge_missing'] evaluates to 0. Fine.

But if the checkbox is checked, form is sent, and then unchecked and submitted again, the value is read as 1!

Please reproduce and fix asap.

[ibelar]

@mvorisek - Sorry could not reproduce the issue with your code above. Submitting form multiple time always send proper data, whether checkbox input is check or unchecked.

[mvorisek]

I have updated the example - the issue occur when an exception is rendered on the server side (and for some reasons then the purge_missing value after check/uncheck is sent to the server as true).

@ibelar can you please retest the updated example?

[ibelar]

@mvorisek - Thanks for the update.
Fix in #909