setParam says method undefined

Question

I'm trying to set one of my menu parameters. But I'm getting the error

0 CALL TO UNDEFINED METHOD JOOMLA\CMS\APPLICATION\SITEAPPLICATION::SETPARAMS()

My code is:

$app = JFactory::getApplication();
$app->setParams($appParams['pageclass_sfx'],$pageClass);

And I see setParams as an option in the API https://api.joomla.org/cms-3/classes/Joomla.CMS.Menu.MenuItem.html#method_setParams

I find the API quite difficult to understand without a relevant example. From searching the CMS code on GitHub I found this example:

function setParams($option, $param = false)
{
    return $this->IC->set_parameters($option, $param);
}

But that seems to confirm my code is written in the right way. In any case it seems to be saying the method doesn't exist.

Answer 1

There are two places where this could be set. The app params and the menu item params. Which ones would be used depends on how component is coded. See example how params are handled in article view https://github.com/joomla/joomla-cms/blob/57ca7a411fbeb3ec0c46594b1d4859c91c0b6a38/components/com_content/views/article/view.html.php#L73-L129.

To set a param in app:

$this->app->getParams()->set('pageclass_sfx', $pageClass);

To set a param for current menu item:

if ($menuItem = $this->app->getMenu()->getActive())
{
    $menuItem->params->set('pageclass_sfx', $pageClass);
}

Answer 2

I don't think you should be trying to set the parameter through the JApplication object, but instead via the component helper, like so:

$menuParams = JComponentHelper::getParams('com_menus');
$menuParams->set('pageclass_sfx', $pageClass);