From e288cdc4700c8e9c9bb8801e2d23ea5e45b02390 Mon Sep 17 00:00:00 2001
From: Classic298 <27028174+Classic298@users.noreply.github.com>
Date: Tue, 3 Nov 2026 19:48:29 +0100
Subject: [PATCH] fix: chat read limit failing on chats with empty or non-text
 messages

With a chat read limit set, reading an imported chat that held empty or non-text message content ended in an error instead of the chat. Such content is now counted and cut as plain text.
---
 backend/open_webui/tools/builtin.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/backend/open_webui/tools/builtin.py b/backend/open_webui/tools/builtin.py
index 9534466fd4..66b340b255 100644
--- a/backend/open_webui/tools/builtin.py
+++ b/backend/open_webui/tools/builtin.py
@@ -1752,13 +1752,13 @@ async def view_chat(
 
         truncation = {}
         max_chars = await Config.get('chats.view_max_chars')
-        if max_chars and sum(len(message['content']) for message in messages) > max_chars:
+        if max_chars and sum(len(str(message['content'] or '')) for message in messages) > max_chars:
             remaining_chars = max_chars
             kept_messages = []
             for message in messages:
                 if remaining_chars <= 0:
                     break
-                content = message['content'][:remaining_chars]
+                content = str(message['content'] or '')[:remaining_chars]
                 kept_messages.append({**message, 'content': content})
                 remaining_chars -= len(content)
             truncation = {