diff --git a/extend/fast/Tree.php b/extend/fast/Tree.php
index 656c87c3..98ad0f88 100644
--- a/extend/fast/Tree.php
+++ b/extend/fast/Tree.php
@@ -479,6 +479,7 @@ class Tree
     {
         foreach ($data as $node) {
             $node['level'] = $level;
+            $node['haschild'] = !empty($node['children']) ? 1 : 0;
             $result[] = $node;
             if (!empty($node['children'])) {
                 $this->getFlattenTree($node['children'], $level + 1, $result);