tripal/tripal_library/views/handlers/views_handler_field_computed_library_nid.inc

<?php
/**
 * @file
 * @todo Add file header description
 */

class views_handler_field_computed_library_nid extends views_handler_field_numeric {
  function construct() {
    parent::construct();
    $this->additional_fields['library_id'] = array('table' => 'library', 'field' => 'library_id');
  }

  function query() {
    $this->ensure_my_table();
    $this->add_additional_fields();
  }

  function render($values) {
    return $values->library_nid;
  }
}