Get CPT title for hidden custom form field in frontend subscription form

Hi peter,
well I have had a look at those articles relating to my issue and I'm not having any success?

Here is my current code...

1) Register the relationship (Between 'Subscribers' and 'Projects'):

add_action( 'mb_relationships_init', 'subscriber_project_relationship' );

function subscriber_project_relationship() {

    MB_Relationships_API::register( [
        'id'         => 'subscriber-to-project',
        'reciprocal' => true,
        'from'       => [
            'object_type'   => 'post',
            'post_type'     => 'project_subscriber',
            'empty_message' => 'No connection here',
            'admin_column'  => true,
        ],
        'to'         => [
            'object_type'   => 'post',
            'post_type'     => 'user_project',
            'empty_message' => 'No connection here',
            'admin_column'  => true,
        ],
    ] );
}

2) Get the project (Where the subscription form was submitted):

add_action( 'rwmb_frontend_after_process', function( $config, $post_id ) {
  MB_Relationships_API::add( get_queried_object_id(), $post_id, 'subscriber-to-project', $order_from = 1, $order_to = 1 );
}, 10, 2 );

3) The expectation:

The "Connects To" admin column within the "Subscriber CPT form Entry" displays the "Project Title" (Where the subscriber form was submitted).

4) What I actually get:

a) Empty "Connects To" admin column. (Not even the 'empty_message' => 'No connection here', which I assume should display when there is no connection)?
b) Duplicate "Subscriber CPT form Entries"?

What am I missing / not understanding?

Many Thanks in advance.

Hi Peter,
tried the above. It returns nothing? No relationship is generated? Just empty admin columns?

Any ideas on what might be missing here?

Cheers 🙂

Hi Peter,
thanks for getting back to me and offering to help. Not to worry, I have now solved my issue.

Cheers 🙂