From 9be46e7b34e3a40cbc489dbae4bfd0915c2090e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?LeoYuan=20=E8=A2=81=E5=8A=9B=E7=9A=93?=
 <yuanlihao1988@gmail.com>
Date: Thu, 7 Jul 2022 20:22:28 +0800
Subject: [PATCH] fix: error thrown when triggering undo after save schema on
 SchemaPane

---
 packages/designer/src/document/node/modal-nodes-manager.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/designer/src/document/node/modal-nodes-manager.ts b/packages/designer/src/document/node/modal-nodes-manager.ts
index 819ac5334..6288b3547 100644
--- a/packages/designer/src/document/node/modal-nodes-manager.ts
+++ b/packages/designer/src/document/node/modal-nodes-manager.ts
@@ -3,6 +3,7 @@ import { Node } from './node';
 import { DocumentModel } from '../document-model';
 
 function getModalNodes(node: Node) {
+  if (!node) return [];
   let nodes: any = [];
   if (node.componentMeta.isModal) {
     nodes.push(node);