500 Layout default not found. (Joomla 4)

Question

I am trying to make a music component for Joomla 4

On the backend, my other forms work fine and the data is stored correctly in the database ( celebrity , album , etc...)

In the music form, when I click on the save and exit button, I get an error 500 Layout default not found. but the information is saved well in the database.

The codes used to display the forms are almost similar to each other and all the forms work correctly in the backend, but the music form has an error.

The code used in com_myext/admin/views/music/view.html.php file for music

defined('_JEXEC') or die('Restricted Access');

use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\View\HtmlView;
use Joomla\CMS\Toolbar\ToolbarHelper;
use Joomla\CMS\Helper\ContentHelper;

class AvisamusicdbViewMusic extends HtmlView
{
    protected $item;
    protected $form;

    public function display($tpl = null)
    {
        $this->item = $this->get('Item');
        $this->form = $this->get('Form');

        if (count($errors = $this->get('Errors'))) {
            throw new \Exception(implode('<br>', $errors), 500);
        }

        $this->addToolbar();

        return parent::display($tpl);
    }

    protected function addToolbar()
    {
        $input = Factory::getApplication()->input;
        $input->set('hidemainmenu', true);

        $user = Factory::getUser();
        $userId = $user->id;
        $isNew = $this->item->id == 0;
        $canDo = ContentHelper::getActions('com_avisamusicdb', 'component');

        ToolbarHelper::title(sprintf('%s: %s', Text::_('COM_AVISAMUSICDB'), Text::_('COM_AVISAMUSICDB_TITLE_MUSICS_EDIT')), '');

        if ($canDo->get('core.edit')) {
            ToolbarHelper::apply('music.apply', 'JTOOLBAR_APPLY');
            ToolbarHelper::save('music.save', 'JTOOLBAR_SAVE');
            ToolbarHelper::save2new('music.save2new');
            ToolbarHelper::save2copy('music.save2copy');
        }

        ToolbarHelper::cancel('music.cancel', 'JTOOLBAR_CLOSE');
    }
}

The code used in com_myext/admin/views/musics/view.html.php file for musics

defined('_JEXEC') or die('Restricted Access');

use Joomla\CMS\Factory;
use Joomla\CMS\Helper\ContentHelper;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\View\HtmlView;
use Joomla\CMS\Toolbar\Toolbar;
use Joomla\CMS\Toolbar\ToolbarHelper;

class AvisamusicdbViewMusics extends HtmlView
{
    protected $items;
    protected $state;
    protected $pagination;
    protected $model;
    public $filterForm, $activeFilters;
public function display($tpl = null)
    {
        $this->items            = $this->get('Items');
        $this->state            = $this->get('State');
        $this->pagination       = $this->get('Pagination');
        $this->model            = $this->getModel('musics');
        $this->filterForm       = $this->get('FilterForm');
        $this->activeFilters    = $this->get('ActiveFilters');


        if (count($errors = $this->get('Errors'))) {
            throw new \Exception(implode('<br>', $errors), 500);
        }

        AvisamusicdbHelper::addSubmenu('musics');
        $this->sidebar = JHtmlSidebar::render();

        $this->addToolbar();
        return parent::display($tpl);
    }
protected function addToolbar()
    {
        $state  = $this->get('State');
        $canDo  = ContentHelper::getActions('com_avisamusicdb', 'component');
        $user   = Factory::getUser();
        $bar    = Toolbar::getInstance('toolbar');

        if ($canDo->get('core.create')) {
            ToolbarHelper::addNew('music.add');
        }

        if ($canDo->get('core.edit')) {
            ToolbarHelper::editList('music.edit');
        }

        if ($canDo->get('core.edit.state')) {
            ToolbarHelper::publish('musics.publish', 'JTOOLBAR_PUBLISH', true);
            ToolbarHelper::unpublish('musics.unpublish', 'JTOOLBAR_UNPUBLISH', true);
            ToolbarHelper::archiveList('musics.archive');
            ToolbarHelper::checkin('musics.checkin');
        }
if ($state->get('filter.published') == -2 && $canDo->get('core.delete')) {
            ToolbarHelper::deleteList('', 'musics.delete', 'JTOOLBAR_EMPTY_TRASH');
        } elseif ($canDo->get('core.edit.state')) {
            ToolbarHelper::trash('musics.trash');
        }

        if ($canDo->get('core.admin')) {
            ToolbarHelper::preferences('com_avisamusicdb');
        }

        JHtmlSidebar::setAction('index.php?option=com_avisamusicdb&view=musics');
        ToolbarHelper::title(sprintf('%s: %s', Text::_('COM_AVISAMUSICDB'), Text::_('COM_AVISAMUSICDB_TITLE_MUSICS')), '');
    }
}

The structure of my folders and files is as follows i upload celebrity & celebrities for example for better understanding ( celebrities code , something like musics code )

admin\views\music\tmpl\edit.php code

<form action="<?php echo Route::_('index.php?option=com_avisamusicdb&view=music&layout=edit&id=' . (int) $this->item->id); ?>" name="adminForm" id="adminForm" method="post" class="form-validate">
    <?php if (JVERSION < 4 && !empty($this->sidebar)) { ?>
        <div id="j-sidebar-container" class="<?php echo $colClass; ?>2">
            <?php echo $this->sidebar; ?>
        </div>
        <div id="j-main-container" class="<?php echo $colClass; ?>10">
        <?php } else { ?>
            <div id="j-main-container"></div>
        <?php } ?>
        <div class="form-horizontal">
            <div class="<?php echo $rowClass; ?>">
                <div class="<?php echo $colClass; ?>12">
                    <?php echo HTMLHelper::_("$tab.startTabSet", 'myTab', array('active' => 'basic_configuration')); ?>
                    <?php echo HTMLHelper::_("$tab.addTab", 'myTab', 'basic_configuration', Text::_('COM_AVISAMUSICDB_FIELDSET_BASIC_INFO')); ?>
                    <?php echo $this->form->renderFieldset('basic_configuration'); ?>
                    <?php echo HTMLHelper::_("$tab.endTab"); ?>

                    <?php echo HTMLHelper::_("$tab.addTab", 'myTab', 'music_links', Text::_('COM_AVISAMUSICDB_FIELDSET_MUSIC_LINKS')); ?>
                    <?php echo $this->form->renderFieldset('music_links'); ?>
                    <?php echo HTMLHelper::_("$tab.endTab"); ?>

                    <?php echo HTMLHelper::_("$tab.addTab", 'myTab', 'music_trailers', Text::_('COM_AVISAMUSICDB_FIELDSET_MUSIC_TRAILER_URLS')); ?>
                    <?php echo $this->form->renderFieldset('music_trailers'); ?>
                    <?php echo HTMLHelper::_("$tab.endTab"); ?>

                    <?php echo HTMLHelper::_("$tab.endTabSet"); ?>
                </div>
            </div>
        </div>
        <input type="hidden" name="task" value="music.edit" />
        <?php echo HTMLHelper::_('form.token'); ?>
        </div>
</form>

Answer 1

If your Save & Exit is supposed to bring you back to a list of records, views/musics, then the stack trace is showing you are trying to load a views/music, the singular or edit form view. Thus it is finding view/music/tmpl/edit.php and not views/musics/tmpl/default.php. Somewhere in your code you have a reference to music and not musics.

In your com_myext/admin/controllers/music.php you probably have reference to set the List view that is to be displayed once the music form is closed.

This is a sample that comes from a Joomla extension generator.

public function __construct()
{
    $this->view_list = 'musics';
    parent::__construct();
}

However if you change the musics to music then it will produce the same error message you seeing.

public function __construct()
{
    $this->view_list = 'music';
    parent::__construct();
}

$this-view_list is expecting a List view and you are providing an edit/form view.