Testing Apache SOLR Integration

Seems to work pretty well, except for the URLs. The array of results seems to be returned with generic numeric arrays while this code seems to think that the results should be keyed by nid. Thus, this is line 321 of uniqueness.module:

    foreach ($related_content as $nid => $item) {
      // Build items and avoid duplicates.
      if (!in_array($nid, array_keys($items))) {
        $items[$nid] = $item;
        $items[$nid]['href'] = url('node/' . $nid);
      }
      if (++$i > $limit) {
        // At least one more than the results_max limit were found
        // -> communicate "and more" to the widget 
        $items[$nid]['more'] = TRUE;
        break;// LOOP EXIT
      }
    }

The URLs on my results were "node/0", "node/1", "node/2", "node/3" and so on.

Actually, looks like they are keyed correctly with the nid at some point, but the array_merge() function wipes them out here (line 439 of uniqueness.module):

  if ($values['title']) {
    $title_content = uniqueness_solr($values['title'], $filter, $nid);
    if (!empty($title_content)) {
      $related_content = array_merge($related_content, $title_content);
    }
  }
  // Search tags.
  if ($values['tags']) {
    $tags = explode(',', $values['tags']);
    foreach ($tags as $tag) {
      $results = uniqueness_solr(trim($tag), $filter, $nid);
      if (!empty($results)) {
        $related_content = array_merge($related_content, $results);
      }
    }
  }

Maybe we should use the "+" operator instead of "array_merge()" in both of these cases?

Yeah, that worked for me. Here's a patch: