[Resolved] Relationship with a User?

[Author]

Posts

[Ellen]

I'm testing out the new Relationship functionality. I need to be able to essentially "assign" a CPT to a user. In this case, it's a "Case Study" and it needs to be assigned to a Dr that is one of the users. We don't want them to just be an author. ACF has the capability of doing an object lookup. I noticed that users was not one of the options under relationships.

Am I missing something?

[Luo Yang]

Hello,

There isn't such a built-in feature or existed documentation for it, but you can try with Types filter hook wpt_field_options, for example:
1) Create a custom select field, the field title is "user id"
2) Add below PHP codes in your theme/functions.php:

add_filter( 'wpt_field_options', 'add_some_options', 10, 3);
function add_some_options( $options, $title, $type )
{
    switch( $title )
    {
    case 'user id':
        $args = array(
            'orderby' => 'display_name',
            'fields' => array( 'ID', 'display_name')
        );
        foreach( get_users($args) as $user ) {
            $options[] = array(
                '#value' => $user->ID,
                '#title' => $user->display_name,
            );
        }
        break;
    }
    return $options;
}

If you need to get some specific users, please check wordpress document:
get_users()
https://codex.wordpress.org/Function_Reference/get_users