I used this code in the functions.php file for exclusion of categories:
function exclude_category($query) {
if ( $query->is_home ) {
$query->set('cat', '-XX');
}
return $query;
}
add_filter('pre_get_posts', 'exclude_category');
but after upgrade to v3.1 it results in fatal error. What is the way to do it now then?