Problem with exclude specific category

Replies: 0

Hello, i want to exclude specific category and products into her from search and ajax search
I add following code

function exclude_terms_from_ajax_search($args)
{

    $args['tax_query'][] = array(
        'taxonomy' => 'product_cat',
        'field' => 'slug',
        'terms' => array('bacon'), // Don't display products in the clothing category on the shop page.
        'operator' => 'NOT IN'
    );

   return $args;

}

add_filter('dgwt_wcas_products_args', 'exclude_terms_from_ajax_search');
add_filter('dgwt_wcas_products_search_page_args', 'exclude_terms_from_ajax_search');

But doesnt make sense?
can you help me?