Ajax multiple module instances

Question

I have created a custom module (test) that has two buttons - a forward and a backward button. When clicked, the Joomla Ajax Interface is used to call the getAjax() function of helper.php. This works just fine, and I get the expected response. The problems appear, when I have multiple instances of the same module.

I have two problems:

1. The module has a parameter, where you select the categories you want results returned from. I cannot figure out, how to use this parameter in getAjax(), when there is more than one of these modules. In the mod_test.php, I just use $params->get('cat_ids'). That is just not possible in the helper (when there is more than one instance of the module) since JModuleHelper::getModule returns the first module found. Each instance of the module will have different paramters, so it is essential to be able to get these.

2. This problem is similar. How do I make an Ajax request to a specific instance of a module with Joomla Ajax Interface? Right now, I am using ?option=com_ajax&module=test&format=raw.

Answer 1

com_ajax dosent need to know correct instance of module, since it only needs to find helper.php (to call getAjax()), which is obviously same for both instances. So this covers your second question.

Change your ajax url to

?option=com_ajax&module=test&format=raw&module_title=MODULE_TITLE_HERE

and you can retrieve it in your getAjax() function to get right instance parameters.

$jinput = JFactory::getApplication()->input;

// Get right instance by title
$module = JModuleHelper::getModule('mod_test', $jinput->getVar('module_title'));
$params = new JRegistry();
$params->loadString($module->params);