Tags which a user can't see don't remain attached to nodes after the user edit nodes.

I understand this problem. It's been reported in the past, and I've resolved it as "by design". What you're asking for, that tags which the user cannot see remain attached to a node, even after that user has edited the node... IMHO that would be more of a bug than the current behavior. I believe when a user submits that edit form, the content should reflect exactly what they submitted. There should not be secret tags which magically remain attached to the node.

However, I could see adding an option to each tac_lite scheme. Something like a checkbox labelled "hide all terms which user cannot view". The difference is... tac_lite will always hide nodes which the user cannot view, but we could make it optional whether tac_lite hides the terms. That is, your user would see all the terms in the node edit form, instead of what they see now, with some terms removed.

I hope I made that clear. Would that work in your case?

If I understand correctly, you want the node to be editable by many users, but only the original author can change the taxonomy. That's not something I'd support in tac_lite ('lite' means simple). But you could write a small hook_form_alter to hide the taxonomy field from non-authors.

Theres still the problem of tac_lite hiding some terms from some users...

Have you looked at the tac module. It came before tac_lite. It's more complex and might have something along the lines of what you want, maybe.

Here's the patch I'm considering to tac_lite.module.

With this patch applied, edit your scheme, unchecking the "term visibility" checkbox. Then tac_lite will not hide terms on the node form. And it's up to you to write your own hook_form_alter if you want to change what the user sees on that form.

I made two modifications to #4.

1. I renamed "Term Visibility" "Restrict Term Visibility".
2. I made it so checking "Restrict Term Visibility" still shows the terms you can view. The previous patch caused the checkbox to always override other tac_lite visibility settings.

I also wasn't sure if these two lines were accidentally included in this patch. (I left them in.)

>               $form['tac_lite'][$config['realm']][$vid]['#description'] =
>                 t('Grant permission to this user by selecting terms.  Note that permissions are in addition to those granted based on user roles.');

So after further investigation I was wrong to make change number 2 (details below). Attached is an updated patch that only changes "Term Visibility" to "Restrict Term Visibility".

However, I think there is a bug in this code. We have two schemas one for viewing and a separate one for updating. Modifying the term visibility checkbox for the viewing schema appropriately changes the available terms when editing to either the limited set or the full set. However, if under the update schema I check the term visibility checkbox then when I edit a node no terms are listed at all. Not even terms that are selected on both the view and the update schemas.

I have this problem too...

- A node have a term selected and this term have the permission "edit/delete" (seted by TAC-Lite) for the role "members".
- User A and UserB are both "members".
- User A edit a node and did not touch anything
- User B can no longer edit.

If I give "administer tac_lite" permission to the "members" role, then the User A and User can edit it normally (obviously).

Is there anything new about it? There are some combination of schemes to solve this?

[EDITED]
I just fix (newbie) my problem whith a custom module:

/**
 * Alter a node form
 */
function [mymodule]_node_form_alter(&$form, &$form_state) {
  // Vocabulary associated in TAC Lite
  $vid = 21;
  // Get the content types associated with the vocabulary 21
  $content_types =  taxonomy_vocabulary_load($vid)->nodes;
  if (isset($form['type']) && in_array($form['type']['#value'], $content_types)) {
    $node = node_load($form['nid']['#value']);
    $terms = taxonomy_node_get_terms_by_vocabulary($node, $vid);
    foreach ($terms as $tid => $term) {
      $form['taxonomy'][$vid][$tid]['#default_value'] = $tid;
    }
  }
}

[EDITED V2]

The above code just works with Taxonomy Super Select (TSS), this works with Drupal core and TSS:

>
/**
 * Alter a node form
 */
function [mymodule]_node_form_alter(&$form, &$form_state) {
  // Vocabulary associated in TAC Lite
  $vid = 21;
  // Take the content types associated with the vocabulary 21
  $content_types =  taxonomy_vocabulary_load($vid)->nodes;
  if (isset($form['type']) && in_array($form['type']['#value'], $content_types)) {
    $node = node_load($form['nid']['#value']);
    $terms = taxonomy_node_get_terms_by_vocabulary($node, $vid);
    foreach ($terms as $tid => $term) {
      // radio/check (Taxonomy Super Select)
      $form['taxonomy'][$vid][$tid]['#default_value'] = $tid;
      // Select/list (Drupal Core)
      $form['taxonomy'][$vid]['#default_value'][] = $tid;
    }
  }
}

Thank you for your contribution to this module. Support for Drupal 6 ended a decade ago, so I'm closing out this issue.