Triggering onContentPrepare from Category Blog view

Question

I found this page on how to implement a custom field in article:

http://docs.joomla.org/Adding_custom_fields_to_the_article_component

and it works well, but only in article view.

What should I do else, to make it show that custom field in each article, when in category blog view?

I tried adding :

$dispatcher = JDispatcher::getInstance();
JPluginHelper::importPlugin('content', 'plg_content_rating');
$results = $dispatcher->trigger('onContentPrepare', array('com_content.category', & $this->item, &$this->item->params, 0));

to my category blog override file, but that didn't work.

Also in components/com_content/views/category/view.html.php file, there is a line like this:

$results = $dispatcher->trigger('onContentPrepare', array ('com_content.category', &$item, &$this->params, 0));

Shouldn't that already trigger all registered content plugins?

The similar line in article's view.html.php file, works well for that purpose.

Answer 1

It depends on your intention.

If you use onContentPrepare to manipulate the markup you need to use the right scope. Your MyPlugin::onContentPrepare will always been fired if the plugin is loaded and a dispatcher triggers "onContentPrepare".

But usually you will check against the scope like

public function onContentPrepare($context, &$row, &$params, $page = 0)
{
    if (in_array($context, array('com_content.article'))
    {
        return true;
    }
}

So make sure you use the right scopes.

If you just want to display the custom data within an overwrite, you can simply access it with $item.