joomla error : #0 Invalid controller class:

Question

All,

I'm trying to develop my first Joomla component and I'm following the MVC tutorial at here.

But I could not progress much because I'm getting the following error.

#0 Invalid controller class: AbcController

I've enabled the debug trace and it's giving an error at the following line:

JControllerLegacy::getInstance()

Needless to mention, I have already spent quite some time searching for a solution but could not find any solution.

I'm working on:

OS: Windows 8.1
PHP version: 5.5.6
MySQL version: 5.6.16
Joomla version: Joomla! 3.3.1 Stable

I followed following steps:

Created an entry in extensions table.

INSERT INTO abc.abc_extensions (extension_id, name, type, element, folder, client_id, enabled, access, protected, manifest_cache, params, custom_data, system_data, checked_out, checked_out_time, ordering, state) VALUES (701, 'com_abc', 'component', 'com_abc', '', 1, 1, 1, 0, '{"name":"com_abc","type":"component","creationDate":"July 2014","author":"ABC Project","copyright":"(C) 2005 - 2014 Open Source Matters. All rights reserved.\n\t","authorEmail":"[email protected]","authorUrl":"www.abc.org","version":"1.0.0","description":"COM_ABC_DESCRIPTION","group":""}', '{"enabled":"0","show_date":"1"}', '', '', 0, '0000-00-00 00:00:00', 0, 0);

The main component code mysite/component/com_abc/abc.php is;

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');

// import joomla controller library
jimport('joomla.application.component.controller');

// Get an instance of the controller prefixed by HelloWorld
$controller = JControllerLegacy::getInstance('Abc');

// Perform the Request task
$input = JFactory::getApplication()->input;
$controller->execute($input->getCmd('task'));

// Redirect if set by the controller
$controller->redirect();

The controller code mysite/component/com_abc/controller.php is:

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');

// import Joomla controller library
jimport('joomla.application.component.controller');

/**
 * Hello World Component Controller
 */
class AbcController extends JControllerLegacy
{

}

The view file mysite/component/com_abc/views/main/view.html.php contains:

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');

// import Joomla view library
jimport('joomla.application.component.view');

/**
 * HTML View class for the HelloWorld Component
 */
class AbcViewMain extends JViewLegacy
{
        // Overwriting JView display method
        function display($tpl = null) 
        {
                // Assign data to the view
                $this->msg = 'Hello World';

                // Display the view
                parent::display($tpl);
        }
}

The template file mysite/component/com_abc/views/main/tmpl/default.php contains:

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
?>
<h1><?php echo $this->msg; ?></h1>

The view is called using index.php?option=com_abc&view=main

Appreciate if you could help me in resolving the issue.

Many thanks.

Elin Elin · Accepted Answer · 2014-07-29T03:45:38

// import Joomla controller library
jimport('joomla.application.component.controller');

Not sure what you are doing there, there is not a file like that, the controller classes new and old are in their respective controller folders. But they are all autoloaded anyway so that's not your problem.

More importantly I suggest you put some code in your controller, specifically a display method that sets the default view for your component. Look at any core component and you'll see what I mean. As it says in the JControllerLegacy::display doc blocks:

This function is provide as a default implementation, in most cases
you will need to override it in your own controllers.

joomla error : #0 Invalid controller class:

2 Answers