Index layouts relationship fields for SearchWP

wp-tweaks.php

function my_searchwp_acf_relationship_processor( $customFieldValue, $customFieldName, $thePost ){
    $content_to_index = '';
    if ( 'partner_filter' == $customFieldName ) {
        $partner_filter = $customFieldValue[0];
    }
    if ( 'post_type' == $customFieldName ) {
        $post_type = $customFieldValue[0];
    
        if ($post_type == 'post') {
            // define the query here
            $args = array(
                'post_type'	=> 'post'
            );
        } else if ($post_type == 'muw_program') {
            // define the query here
            $args = array(
                'post_type'	=> 'muw_program' 
            );
        } else if ($post_type == 'muw_events') {
            // define the query here
            $args = array(
                'post_type'	=> 'muw_events'
            );
        } else if ($post_type == 'muw_allies') {
            // define the query here
            $args = array(
                'post_type'	=> 'muw_allies'
            );
        } else if ($post_type == 'muw_partners') {
            // define the query here
            // has option to filter by taxonomy, muw_partner_types
            // otherwise, display all
            if ( $partner_filter != '' ) {
                $args = array(
                    'post_type'	=> 'muw_partners',
                    'tax_query' => array(
                        array(
                            'taxonomy' => 'muw_partner_types',
                            'field' => 'id',
                            'terms' => $partner_filter
                        )
                    )
                );
            } else {
                $args = array(
                    'post_type'	=> 'muw_partners'
                );
            }
        }
        $query = new WP_Query($args);
        if ($query->have_posts()) :
            while ($query->have_posts()) : $query->the_post();
                $listing_title = get_the_title();
                $content_to_index .= $listing_title . ' ';
            endwhile;
        endif; 
        return $content_to_index;
        wp_reset_postdata();
    }
    
    preg_match( '/^layouts_\d+_available_content/i', $customFieldName, $matches );
    if( ! empty( $matches ) && is_array( $customFieldValue ) && ! empty( $customFieldValue ) ){
        // We want to index Titles not IDs
        foreach( $customFieldValue[0] as $post_id ){
            $post_title = get_the_title( absint( $post_id ) );
            $content_to_index .= $post_title . ' ';
        }
        return $content_to_index;
    }
    return $customFieldValue;
}
add_filter( 'searchwp_custom_fields', 'my_searchwp_acf_relationship_processor', 10, 3 );