From 06f7061acf7c949fe3b85dc51caebfb5d072c93f Mon Sep 17 00:00:00 2001
From: Nell Hardcastle <nell@dev-nell.com>
Date: Thu, 4 Jan 2024 09:46:29 -0800
Subject: [PATCH] fix(api): Prevent crash when tree is requested with no
 children

---
 packages/openneuro-server/src/handlers/datalad.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/openneuro-server/src/handlers/datalad.ts b/packages/openneuro-server/src/handlers/datalad.ts
index 4490e5b77..1982f4711 100644
--- a/packages/openneuro-server/src/handlers/datalad.ts
+++ b/packages/openneuro-server/src/handlers/datalad.ts
@@ -29,7 +29,10 @@ export const getFile = async (req, res) => {
       if (level == pathComponents.slice(-1)) {
         file = files.find((f) => !f.directory && f.filename === level)
       } else {
-        tree = files.find((f) => f.directory && f.filename === level).id
+        // This tree may exist but have no children
+        if (files) {
+          tree = files.find((f) => f.directory && f.filename === level).id
+        }
       }
     } catch (err) {
       // ConnectTimeoutError is Node/Undici and TimeoutError is the standard DOMException name