Add ability to diff CCK Fields

yes it does. anyone else seeing this?

It appears that diff cannot do this atm, so I am changing this to a feature request.

diff does this alreaady. in D6, the code is in cck itself.

In D6 version the problem is only with CCK Content Taxonomy fields. These fields are not shown in diff's, and correspondig terms are not tracked correctly. Only the last versions of terms are shown.
Don't know if it is hard to repair. I suppose we need to write an additional .inc file for the Content Taxonomy...

After some testing: It diff's ordinary CCK fields, but not Content taxonomy fields. And Date fields aren't showed at all.

Diffing CCK date fields actually works, but only for the start date. A changed end date is not shown in the diff. Workaround: create 2 separate fields for start and end. :-\

jmroth, I created a hook_diff() in my module to also show end date changes in the diff output. Maybe something like this should go into the date module?

/**
 * Implementation of hook_diff().
 *
 * Add the end dates of CCK fields of the 'datetime' type to the output of
 * the diff module's diff between two revisions. Inspired by content_diff() in
 * content.diff.inc from the CCK module.
 */
function my_module_diff(&$old_node, &$new_node) {
  $result = array();
  // Prevent against invalid 'nodes' built by broken 3rd party code.
  if (isset($new_node->type)) {
    $type = content_types($new_node->type);
    $field_types = _content_field_types();
    foreach ($type['fields'] as $field) {
      // Ignore fields the current user is not allowed to view.
      if (!content_access('view', $field, NULL, $new_node)) {
        continue;
      }

      if ($field['type'] == 'datetime') {
        $result[$field['field_name']] = array(
          // only specifiy the old and new values as other fields like #name,
          // #weight or #format would be merged into arrays with the equally
          // named fields specified by other hook_diff()'s which would then
          // lead to output errors
          '#old' => $old_node->{$field['field_name']}[0]['value2'],
          '#new' => $new_node->{$field['field_name']}[0]['value2'],
        );
      }
    }
  }

  return $result;
}

Patch posted http://drupal.org/node/448898#comment-3213876

With php5.3.0 + PF6.17 + Diff 6.x-2.x-dev (2010-Jul-11) + CCK 6.x-3.x-dev, the following patch fixed diff display of CCK fields:

http://drupal.org/node/714762

This patch was committed in the referenced issue.