Issue #1517284: translate old certificate column on course_node to creation of...

<?php

function course_certificate_install() {

  course_certificate_update_6101();

}

/**

 * Create certificate course objects at the end of a course for courses that had

 * the "certificate" checkbox checked. Drop the old field.

 */

function course_certificate_update_6101() {

  $ret = array();

  drupal_get_schema(NULL, TRUE);

  drupal_load('module', 'uuid');

  if (db_column_exists('course_node', 'certificate')) {

    // Find courses that had certificate checked, but no course object.

    $sql = "select * from {course_node} cn

      inner join {course_outline} co on (cn.nid = co.nid and co.requirement_type = 'course_certificate')

      where cn.certificate and co.snid is null";

    $result = db_query($sql);

    while ($row = db_fetch_object($result)) {

      $object = array(

        'requirement_type' => 'course_certificate',

        'requirement_component' => 'certificate',

        'nid' => $row->nid,

        'enabled' => 1,

        'required' => 0,

        'hidden' => 0,

        'title' => 'Certificate',

        'weight' => 999,

        'uuid' => uuid_uuid(),

      );

      drupal_write_record('course_outline', $object);

    }

  }

  db_drop_field($ret, 'course_node', 'certificate');

  return $ret;

}