Advanced search for meta fields

The meta_query parameter must be an array of array if you want to add relation between different key, even they only one key to grab. So $query->set( ‘meta_query’, $meta_query ); Must be $query->set( ‘meta_query’, array($meta_query) ); You can have a look to WP_Query for more details. Hope it helps and work, I just look for … Read more