If you are using the Tree Behavior sometimes the lft and rght columns get out of sync, especially if you are adding and deleting records during development. Add the following method to your app/app_controller.php your choice.
1: public function recover_tree() {
2: $modelClass = $this->modelClass;
3: $recovery = $this->$modelClass->recover();
4: if ($recovery) {
5: $this->Session->setFlash(__($modelClass . ' reordered.'), 'flash/success');
6: $this->redirect(array('action' => 'index'));
7: } else {
8: $this->Session->setFlash(__('Error recovering ' . $modelClass . ' tree'), 'flash/error');
9: }
10: exit;
11: }
These methods/actions are meant to be called manually as you feel needed.
Examle : http://localhost/projects/categories/recover_tree
