function system_update_159 in Drupal 4

Same name and namespace in other branches

1. 5 modules/system/system.install \system_update_159()

Retrieve data out of the old_revisions table and put into new revision system.

The old_revisions table is not deleted because any data which could not be put into the new system is retained.

File

database/updates.inc, line 1138

Code

function system_update_159() {
  $ret = array();
  $result = db_query_range("SELECT * FROM {old_revisions} WHERE done = 0 AND type IN ('page', 'story', 'poll', 'book', 'forum', 'blog') ORDER BY nid DESC", 0, 20);
  if (db_num_rows($result)) {
    $vid = db_next_id('{node_revisions}_vid');
    while ($node = db_fetch_object($result)) {
      $revisions = unserialize($node->revisions);
      if (isset($revisions) && is_array($revisions) && count($revisions) > 0) {
        $revisions_query = array();
        $revisions_args = array();
        $book_query = array();
        $book_args = array();
        $forum_query = array();
        $forum_args = array();
        foreach ($revisions as $version) {
          $revision = array();
          foreach ($version['node'] as $node_field => $node_value) {
            $revision[$node_field] = $node_value;
          }
          $revision['uid'] = $version['uid'];
          $revision['timestamp'] = $version['timestamp'];
          $vid++;
          $revisions_query[] = "(%d, %d, %d, '%s', '%s', '%s', '%s', %d, %d)";
          $revisions_args = array_merge($revisions_args, array(
            $node->nid,
            $vid,
            $revision['uid'],
            $revision['title'],
            $revision['body'],
            $revision['teaser'],
            $revision['log'],
            $revision['timestamp'],
            $revision['format'],
          ));
          switch ($node->type) {
            case 'forum':
              if ($revision['tid'] > 0) {
                $forum_query[] = "(%d, %d, %d)";
                $forum_args = array_merge($forum_args, array(
                  $vid,
                  $node->nid,
                  $revision['tid'],
                ));
              }
              break;
            case 'book':
              $book_query[] = "(%d, %d, %d, %d)";
              $book_args = array_merge($book_args, array(
                $vid,
                $node->nid,
                $revision['parent'],
                $revision['weight'],
              ));
              break;
          }
        }
        if (count($revisions_query)) {
          $revision_status = db_query("INSERT INTO {node_revisions} (nid, vid, uid, title, body, teaser, log, timestamp, format) VALUES " . implode(',', $revisions_query), $revisions_args);
        }
        if (count($forum_query)) {
          $forum_status = db_query("INSERT INTO {forum} (vid, nid, tid) VALUES " . implode(',', $forum_query), $forum_args);
        }
        if (count($book_query)) {
          $book_status = db_query("INSERT INTO {book} (vid, nid, parent, weight) VALUES " . implode(',', $book_query), $book_args);
        }
        $delete = FALSE;
        switch ($node->type) {
          case 'forum':
            if ($forum_status && $revision_status) {
              $delete = TRUE;
            }
            break;
          case 'book':
            if ($book_status && $revision_status) {
              $delete = TRUE;
            }
            break;
          default:
            if ($revision_status) {
              $delete = TRUE;
            }
            break;
        }
        if ($delete) {
          db_query('DELETE FROM {old_revisions} WHERE nid = %d', $node->nid);
        }
        else {
          db_query('UPDATE {old_revisions} SET done = 1 WHERE nid = %d', $node->nid);
        }
        switch ($GLOBALS['db_type']) {
          case 'mysqli':
          case 'mysql':
            $ret[] = update_sql("UPDATE {sequences} SET id = {$vid} WHERE name = '{node_revisions}_vid'");
            break;
          case 'pgsql':
            $ret[] = update_sql("SELECT setval('{node_revisions}_vid_seq', {$vid})");
            break;
        }
      }
      else {
        db_query('UPDATE {old_revisions} SET done = 1 WHERE nid = %d', $node->nid);
        watchdog('php', "Recovering old revisions for node {$node->nid} failed.", WATCHDOG_WARNING);
      }
    }
  }
  if (db_num_rows($result) < 20) {
    $ret[] = update_sql('ALTER TABLE {old_revisions} DROP done');
  }
  else {
    $ret['#finished'] = FALSE;
  }
  return $ret;
}