Display Sortabel ACF Post Object field in admin column

Sortabel-ACF-Post-Object.txt

/*
 * Add columns to post list
 */
 function add_acf_columns ( $columns ) {
   return array_merge ( $columns, array (
     'custom_column' => __ ( 'Custom column' ),
   ) );
 }
 add_filter ( 'manage_postname_posts_columns', 'add_acf_columns' );

 /*
  * Add columns to Hosting CPT
  */
  function add_custom_column ( $column, $post_id ) {
    switch ( $column ) {
      case 'custom_column':
        $position = get_field( 'field_name', $post_id );

        echo $position;
        break;
    }
 }
 add_action ( 'manage_postname_posts_custom_column', 'add_custom_column', 10, 2 );


 add_filter('manage_postname_posts_columns', 'column_order');
 
 function column_order($columns) {
   $n_columns = array();
   $move = 'custom_column'; // what to move
   $before = 'date'; // move before this
   foreach($columns as $key => $value) {
     if ($key==$before){
       $n_columns[$move] = $move;
     }
       $n_columns[$key] = $value;
   }
   return $n_columns;
 }




add_filter( 'manage_edit-postname_sortable_columns', 'my_sortable_custom_column' );
function my_sortable_custom_column( $columns ) {
    $columns['custom_column'] = 'custom_column';

    //To make a column 'un-sortable' remove it from the array
    //unset($columns['custom_column']);

    return $columns;
}

add_action( 'pre_get_posts', 'my_custom_column_orderby' );
function my_custom_column_orderby( $query ) {
    if( ! is_admin() )
        return;

    $orderby = $query->get( 'orderby');

    if( 'custom_column' == $orderby ) {
        $query->set('meta_key','field_name');
        $query->set('orderby','meta_value_num');  // if numeric
    }
}