Hi there!
If I understand correctly, you want to filter all tracks that have a certain condition already defined on the select.
I did something similar using: acf/fields/post_object/query (https://www.advancedcustomfields.com/resources/acf-fields-post_object-query/).
You need to a filter that will call the function that will narrow down the choices using a query.
In my case (this is OOP code but you should get the gist), I added the filter:
$action_filter_register->add_filter( 'acf/fields/post_object/query/name=client_match_object_field', Match::class, 'filter_participant_options', 10, 3 );
And then defined the function that did the trick:
public function filter_participant_options( $args, $field, $post_id ) {
$allowed_states = EntityStates::get_allowed_states_for_matching();
$args['numberposts'] = -1;
$args['meta_query'] = array(
array(
'key' => '_state',
'value' => implode( ',', array_keys( $allowed_states ) ),
'compare' => 'IN',
),
);
return $args;
}
Hope this helps!
