How best to downgrade from 6.x-2.0-aplha1 to 1.x branch

It has been a while since I tested this, but a key issue is that v2 used tokens whereas v1 doesn't (yet), so I would definitely recommend heavily testing it first.

Hi!

I had a same issue. I downgrade the module by deleting the 2.0-alpha1 nodewords directory and replace with the latest 1.x branch stable (1.4). THen I run update.php - it makes some updates.
Then check on admin/content/nodewords your settings. If you set some defaults in 2.0 version and used tokens, you should replace them from database. I've checked mine and there was some tokens in my description field: [metatags-description-raw]
So I wrote a batch process to replace these values in the database to current teaser value.

Here's my code I hope it helps - I run it from devel/php:

function _mymodule_nodewords_rebuild() {
  $batch = _mymodule_nodewords_rebuild_batch();
  batch_set($batch);
  batch_process('devel/php');

}

function _mymodule_nodewords_rebuild_batch() {
  $operations = array(
    array('_mymodule_nodewords_rebuild_operation', array())
  );

  $batch = array(
    'title' => t('Processing nodewords data rebuild'),
    'operations' => $operations,
    'finished' => '_mymodule_nodewords_rebuild_finished',
    'progress_message' => t('Processing...'),
    'error_message' => t('Nodewords migration has encountered an error.'),
  );

  return $batch;
}

function _mymodule_nodewords_rebuild_operation(&$context) {
  if (empty($context['sandbox'])) {
    $all = db_fetch_object(db_query("SELECT count(id) as allpost FROM {nodewords} n WHERE n.name = 'description' AND n.content LIKE '%[metatags-description-raw]%' AND id > 0"));
    $context['sandbox']['total_node'] = $all->allpost;

    // Initialize some variables.
    $context['sandbox']['node_count'] = 0;
    $context['sandbox']['batch_start'] = 1;
  }
  $limit = 50;

  $query = "SELECT n.mtid, n.content, nr.teaser, nr.nid FROM {nodewords} n LEFT JOIN {node_revisions} nr ON n.id = nr.nid WHERE n.name = 'description' AND n.content LIKE '%[metatags-description-raw]%' AND id > 0 ORDER BY mtid ASC";
  $result = db_query_range($query, 0, $limit);
  while ($row = db_fetch_array($result)) {
    $data = unserialize($row['content']);
    $teaser_raw = trim(strip_tags($row['teaser']));
    $suffix = '';
    if (strlen($teaser_raw) >= 128) {
      $sentence_end = strpos($teaser_raw, '.', 128);
    }
    else {
      $sentence_end = strlen($teaser_raw);
    }
    // Meta description recommended length is 155 character, so we should cut them
    if ($sentence_end >= 155 && strlen($teaser_raw) >= 155) {
      $sentence_end = strpos($teaser_raw, ' ', 155);
      $suffix = '...';
    }
    $data['value'] = substr($teaser_raw, 0, $sentence_end) . $suffix;
    $sql = "UPDATE {nodewords} SET content = '%s' WHERE mtid = %d";
    $args = array(serialize($data), $row['mtid']);
    $update = db_query($sql, $args);

    $context['results'][] = $row['nid'];
    $context['sandbox']['node_count']++;
  }

  $context['message'] = t('Nodes !node_count of !total_lines processed', array(
      '!node_count' => $context['sandbox']['node_count'],
      '!total_lines' => $context['sandbox']['total_node'],
    ));

  $context['finished'] = floor($context['sandbox']['node_count'] / $context['sandbox']['total_node'] * 100) / 100;
}

function _mymodule_nodewords_rebuild_finished($success, $results, $operations) {
  if ($success) {
    drupal_flush_all_caches();
    // Here we could do something meaningful with the results.
    // We just display the number of nodes we processed...
    $message = count($results) . ' processed.';
  }
  else {
    // An error occurred.
    // $operations contains the operations that remained unprocessed.
    $error_operation = reset($operations);
    $message = 'An error occurred while processing ' . $error_operation[0] . ' with arguments :' . print_r($error_operation[0], TRUE);
  }
  drupal_set_message($message);
}

Thank you for taking the time to work on this. However, the module is no longer supported, so I'm closing this issue.