Amend Property Query

gistfile1.txt

add_action( 'propertyhive_property_query', 'custom_field_property_filter' );
function custom_field_property_filter( $q ){

    global $post;

    if (is_post_type_archive( 'property' ))
    {
        if ( isset($_GET['my_field']) && $_GET['my_field'] != '' ) // YOUR CRITERIA HERE
        {
            $meta_query = $q->get( 'meta_query' );
    
            $meta_query[] = array(
                'key'       => 'my_field',
                'value'     => $_GET['my_field'],
                'compare'   => '='
            );
    
            $q->set( 'meta_query', $meta_query );
        }
    }
}