Joomla! Documentation™

To extend the rules that can be used by Joomla to validate form input, the following changes are needed:

Step 1: Alter the controller

In the controller function add these lines:

$form	= $model->getForm();
$form->addRulePath(JPATH_COMPONENT.'/models/rules');

Step 2: Add the rule files

In the folder models/rules in the component add any rule file you want to use.