alibenmoussa

Sorry The end is missing.

The full code below works for me from admin:

function allowCoursesAuthorEditing()
{
    if(current_user_can('administrator')){
        add_post_type_support( 'courses', 'author' );
    }
}

add_action('init','allowCoursesAuthorEditing');

function coursesAuthor($data , $postarr){
    global $wpdb;

    $courses_post_type = 'courses'; // type of custom post type tutor course
    $post_ID = $postarr['ID']; // ID OF POST
    $post_author = $postarr['post_author'];  POST TYPE

    if ($data['post_type'] === $courses_post_type){
        if ($post_author > 0){
            $data['post_author'] = $post_author;
        }else{
            $data['post_author'] = get_current_user_id();
        }
    }

    return $data;
}

add_filter('wp_insert_post_data', 'coursesAuthor', '99', 2);