public function filters()
{
    return array(
        array(
            'ext.yiiext.filters.activeFormValidation.EActiveFormValidationFilter[ +|- Action1, Action2, ...]',
            // The single primary CModel class name or array of classes model.
            // The EActiveFormValidationFilter::getModelsInternal() method will return a models of this classes.
            'models'=>array(
                'ModelClassToBeValidate', // Set model name
                SecondModel:model()->findByPk(1), // Set model instance
                array('modelClass'=>'ThirdModel','scenario'=>'update','isNewRecord'=>true), // Set model name and scenario
            ),
            // Id of the form
            'formId'=>'form',
            // The name of the parameter indicating the request is an AJAX request.
            'ajaxVar'=>'ajax,
        ),
    );
}