protected function setListProductCategory()
    {
        $options = $this->query_filter;
        $options['placeholder'] = true;

        $conditions = array(
                'limit' => $this->data_limit,
                'category_id' => $this->data_category['category_id']) + $this->query_filter;

        $this->data_products = $this->getProducts($conditions, $options);
    }