<?php
/** make the datasource something you know will always have a value for every post - like post title - it
** is only a placeholder and won't be indexed
**/
add_filter( 'facetwp_index_row', function( $params, $class ) {
if ( 'search_new' == $params['facet_name'] ) { // change my_facet to name of your facet
$project_id = $params['post_id'];
/** some code here to make an array of post ids of
people posts that are associated with the project **/
// loop of array of people post ids you have created above
foreach ( $people_posts as $people ) {
// Update the values to be inserted into database.
$people_title = get_the_title( $people );
$people_params = $params;
$people_params['facet_value'] = $people_title;
$people_params['facet_display_value'] = $people_title;
// Insert each value to the database.
$class->insert( $people_params );
}
return false; // we won't index the original value
}
return $params;
}, 10, 2 );