This did the job with a true or false field, please tell me if the code is very poor or if the solution is valid.
function update_featured_post( $post_id ) {
// Get current id of post being edited
$currentID = get_the_ID();
// Get all posts except current post
$posts = get_posts([
'post_type' => 'post',
'post__not_in' => [$currentID],
]);
// Get ACF true or false value
$value = get_field('post_em_destaque');
// Find if other post is marked as featured
if( $value = true ) {
foreach( $posts as $p ) {
// Uncheck field if checked
update_field('post_em_destaque', false, $p->ID);
}
}
}
add_action('acf/save_post', 'update_featured_post', 20);
Thank you for your patient, hope someone find this code useful.
