From 704ef16ce3c58bd354a8633366405e09202463ce Mon Sep 17 00:00:00 2001
From: Enoughappens <155134541+Enoughappens@users.noreply.github.com>
Date: Sat, 19 Apr 2025 12:57:08 +0800
Subject: [PATCH] fix streaming "list index out of range"

---
 lightrag/llm/openai.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lightrag/llm/openai.py b/lightrag/llm/openai.py
index 8b05c61b..9fbec5e1 100644
--- a/lightrag/llm/openai.py
+++ b/lightrag/llm/openai.py
@@ -200,6 +200,15 @@ async def openai_complete_if_cache(
         async def inner():
             try:
                 async for chunk in response:
+                    # Check if choices exists and is not empty
+                    if not hasattr(chunk, 'choices') or not chunk.choices:
+                        logger.warning(f"Received chunk without choices: {chunk}")
+                        continue
+                    
+                    # Check if delta exists and has content
+                    if not hasattr(chunk.choices[0], 'delta') or not hasattr(chunk.choices[0].delta, 'content'):
+                        logger.warning(f"Received chunk without delta content: {chunk.choices[0]}")
+                        continue                    
                     content = chunk.choices[0].delta.content
                     if content is None:
                         continue