Allow undoing edits that change content model if top

[lhc/web/wiklou.git] / includes / content / ContentHandler.php

diff --git a/includes/content/ContentHandler.php b/includes/content/ContentHandler.php
index bf4cc6d..4e50c8e 100644 (file)
--- a/includes/content/ContentHandler.php
+++ b/includes/content/ContentHandler.php
@@ -1017,7 +1017,13 @@ abstract class ContentHandler {
                try {
                        $this->checkModelID( $cur_content->getModel() );
                        $this->checkModelID( $undo_content->getModel() );
-                       $this->checkModelID( $undoafter_content->getModel() );
+                       if ( $current->getId() !== $undo->getId() ) {
+                               // If we are undoing the most recent revision,
+                               // its ok to revert content model changes. However
+                               // if we are undoing a revision in the middle, then
+                               // doing that will be confusing.
+                               $this->checkModelID( $undoafter_content->getModel() );
+                       }
                } catch ( MWException $e ) {
                        // If the revisions have different content models
                        // just return false