Joomla 4 Get a list of site articles in the module settings

Question

My code

use Joomla\CMS\Language\Text;

use Joomla\CMS\Access\Access;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Router\Route;
use Joomla\Component\Content\Administrator\Extension\ContentComponent;
use Joomla\Component\Content\Site\Helper\RouteHelper;

\defined('_JEXEC') or die;

$app = Factory::getApplication('Site');

// Get an instance of the generic articles model
$model = $app->bootComponent('com_content')->getMVCFactory()->createModel('Articles', 'Site', ['ignore_request' => true]);
$appParams = $app->getParams();
$model->setState('params', $appParams);
$model->setState('filter.published', ContentComponent::CONDITION_PUBLISHED);
$items = $model->getItems();

The first error in the line

$appParams = $app->getParams();

Call to undefined method Joomla\CMS\Application\AdministratorApplication::getParams()

The second error in the line

$items = $model->getItems();

Call to a member function get() on null

1 () JROOT\components\com_content\src\Model\ArticlesModel.php:273

2 Joomla\Component\Content\Site\Model\ArticlesModel->getListQuery() JROOT\libraries\src\MVC\Model\ListModel.php:215

3 Joomla\CMS\MVC\Model\ListModel->_getListQuery() JROOT\libraries\src\MVC\Model\ListModel.php:264

4 Joomla\CMS\MVC\Model\ListModel->getItems() JROOT\components\com_content\src\Model\ArticlesModel.php:640

5 Joomla\Component\Content\Site\Model\ArticlesModel->getItems() JROOT\administrator\modules\mod_antajaxrequest\articlelist.php:21

Tell me how to get a list of site articles in the administrative panel, in the module parameters? Thank you.

Answer 1

Joomla\CMS\Factory::getApplication() no longer takes any arguments. It always return the active application instance. Joomla\CMS\Application\AdministratorApplication doesn't have a getParams() method so that's where the error comes. If really needed, you can get the site application from the service container:

Joomla\CMS\Factory::getContainer()->get(Joomla\CMS\Application\SiteApplication::class);

Using application within application, however, is a bad practice and won't work correctly most of the time. In your case you don't really need this anyways - params from site application are request-specific and will not work correctly in backend. Essentially SiteApplication::getParams() is used to merge component params with active menu item params, which are not relevant when running this code in backend or generally when the request is ignored using ignore_request option. So you can pass just the component params:

$model->setState('params', clone ComponentHelper::getParams('com_content'));

Another option would be to, of course, use the backend model instead. It will return the same articles but without running any code that is relevant only to frontend.