Index: nodereference.module
===================================================================
RCS file: /cvs/drupal/contributions/modules/cck/nodereference.module,v
retrieving revision 1.25.2.12
diff -u -r1.25.2.12 nodereference.module
--- nodereference.module	17 Oct 2006 13:21:21 -0000	1.25.2.12
+++ nodereference.module	30 Oct 2006 21:38:14 -0000
@@ -87,6 +87,23 @@
         $items[$delta]['view'] = content_format($field, $item, 'default', $node);
       }
       return theme('field', $node, $field, $items, $teaser, $page);
+      
+    case 'update':
+      if ($field['widget']['type'] == 'nodereference_autocomplete' && !$field['multiple']) {
+        $db_info = content_database_info($field);
+        
+        // Delete and insert, rather than update, in case a field was added.
+        db_query('DELETE FROM {'. $db_info['table'] .'} WHERE vid = %d', $node->vid);
+        
+        if (db_result(db_query('SELECT COUNT(*) FROM {'. $db_info['table'] .'} WHERE vid = %d AND nid = %d', $node->vid, $node->nid))) {
+          db_query('UPDATE {'. $db_info['table'] .'} SET '. $db_info['columns']['nid']['column'] .' = %d WHERE vid = %d AND nid = %d', $item['nid'], $node->vid, $node->nid);
+        }
+        else {
+          db_query('INSERT INTO {'. $db_info['table'] .'} ('. $db_info['columns']['nid']['column'] .', vid, nid) VALUES (%d, %d, %d)', $item['nid'], $node->vid, $node->nid);
+        }
+        return;
+      }
+      break;
   }
 }