connect users to Custom post types

Question

I’ve created a Custom Post Type to manage Events and now, i would like the users of my site (only registered ones) to be able to register to any events created. On the events page, they would just click a button and they would be associated with the event (no need for tickets, payment,…). I have no clue on where to look at to implement that (taxonomies, meta, … ?) and how this will be stored (on user entity, on event custom post type entity?) I need help !

Thanks

Answer 1

I suggest you to save it on user entity. Use update_user_meta() and stock it as an array. In this case if you delete an user, all associates info will be delete too.

<?php
$user_id = get_current_user_id();
$user_events = get_user_meta($user_id, 'user_events', true);
$user_events[$event_id] = $event_id; //you can also stock more infos, i use event_id as key to don't have duplicate event by user
update_user_meta($user_id, 'user_events', $user_events);
?>