Preview mode does not correctly display titles

As far as I can see this is quite hard to solve, because there's no good hook which we can use to override the data used for node previews; the ones I tested with in the past all had incomplete node objects, which means that tokens cannot be constructed properly and the title just ends up being empty (or rather the pattern string with empty placeholders).

If anyone can figure out a good way to this I'll be more than happy to add it to the module! I'm also reclassifying this as a feature request, as this is more or less by-design at the moment.

What about using:

/**
 * Implements hook_node_submit().
 */
function auto_entitylabel_node_submit($node, $form, &$form_state) {
  if (auto_entitylabel_is_needed($node, $form['#entity_type'], TRUE)) {
    auto_entitylabel_set_title($node, 'node');
  };
}

I could not find a good entity hook but this problem seems to be focused on nodes. AFAIK entity functions are not called for nodes until the node is saved so cannot be used in the preview stage.

One caveat: this will probably mess up the NID token. Since NID does not exist in preview stage it will not replace it with the correct value. Later calls to auto_entitylabel_is_needed() will return FALSE so when NID is available it will not be updated.

Issue no more persists, probably fixed with latest code releases.

Thanks a lot for all your inputs. Marking this issue as fixed, feel free to re-open if issue still persists.