TYPO3 f:form with additional arguments, where submit not update the arguments

I am using TYPO3 10.4.15 My edit view:

f:section name="content">
    <h1>Edit Album</h1>
    <f:flashMessages />
    <f:render partial="FormErrors" />
    <f:form id='fNew' action="update" name="album" object="{album}" arguments="{mode:mode, disc:disc}" >
    <f:render partial="Album/FormFields" arguments="{album:album, disc:disc}" />
    <f:form.submit value="Save" />
    </f:form>
</f:section>
</html>

This is the relevant part of the partial formfields.html:

    <f:if condition='{disc}'>
    <input type='text' name="disc[0][name][]" />
    </f:if>

The error_log with the disc structure looks:

 Update-Disc: array (
  0 => 
  array (
    'name' => '',
    'trackNum' => '1',
    'track' => 
    array (
      0 => 
          array (
            'title' => '',
            'duration' => '0',
            'composer' => '',
            'texter' => '',
            'musicFile' => '',
            'imageFile' => '',
          ),
        ),
      ),
    )

And this is the "updateAction" part of the controller

/**
 * action update
 * 
 * @param \HGA\Album\Domain\Model\Album $album
 * @param string $mode
 * @param array $disc
 * @return string|object|null|void
 */
public function updateAction(\HGA\Album\Domain\Model\Album $album, $mode, $disc)
{
    error_log("Update-Disc: " . var_export($disc, true) . " Mode: " . $mode, 0);
    if ($mode == 'tracks') {
       $this->editAction($album, $mode, $disc);
    }
    error_log("Update: " . var_export($album, true) . " Mode: " . $mode, 0);
    $this->addFlashMessage('The object was updated. Please be aware that this action is publicly accessible unless you implement an access check. See https://docs.typo3.org/typo3cms/extensions/extension_builder/User/Index.html', '', \TYPO3\CMS\Core\Messaging\AbstractMessage::WARNING);
    $this->albumRepository->update($album);
    $this->redirect('list');
}

If I write something into the text input field and execute submit, I get the error_log you can see above. The value I have typed in the input field is missing. It is only the array, as I have send it to the view. The mode string will be transmitted correctly, but with the disc array is maybe something wrong!

The disc array is more complex, but I made it simple, because I need to understand how it works in general. I also need this additional disc array and can not doing it with the album object!

Thanks in advance for your help.

Solution

You are ignoring your plugin's namespace in combination with misinterpretation of f:form arguments.

Each field for your plugin has a prefix like tx_hgaalbum... followed by your property's name in square brackets. So the fieldname for disc should look like tx_hgaalbum...[disc]. Have a look into the HTML code and see which names are generated for the other properties.

The second problem is using the arguments in the form-ViewHelper. This will only add the arguments to the action URI of your form. That's why you're getting your initial values for disc.