Thanks a lot John for the reply.
I saved the value in a global array on my functions.php (or at least I think so..)
Any clue why on the archive-cars.php is working and in the category.php isn’t?
Here my functions.php file
**
* Archive cars FILTER using pre get post?
*/
// array of filters
//NOTE: it's a sub field inside a field group so the meta query becomes => groupname_subfield
$GLOBALS['my_query_filters'] = array(
'car_info_petrol' => 'carburante',
'car_info_gearshift' => 'cambio',
'car_info_brand' => 'marca'
);
function my_pre_get_posts( $query ) {
// do not modify queries in the admin
if( is_admin() ) {return $query;}
// only modify queries for 'cars' post type
if( isset($query->query_vars['post_type']) && $query->query_vars['post_type'] == 'cars' ) {
// loop over filters
foreach( $GLOBALS['my_query_filters'] as $key => $name ) {
//allow the url to alter the query
if( isset($_GET[$name]) ) {
$meta_query[] = array(
'key' => $key,
'value' => $_GET[$name],
'compare' => 'IN'
);
//Update the meta query args
$query->set('meta_query', $meta_query);
}
}
} //End of the if only on the post type cars
// return
return $query;
}
add_action('pre_get_posts', 'my_pre_get_posts');
