From 61096596bcbe7d2d74c8633f61c5087470e18c18 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BB=84=E8=85=BE?=
 <101850389+hangters@users.noreply.github.com>
Date: Mon, 29 Jul 2024 09:21:31 +0800
Subject: [PATCH] fix OpenAI llm return bug (#1728)

### What problem does this PR solve?

fix OpenAI llm return bug

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
---
 rag/llm/chat_model.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rag/llm/chat_model.py b/rag/llm/chat_model.py
index 3612cc55d..48dc29ba0 100644
--- a/rag/llm/chat_model.py
+++ b/rag/llm/chat_model.py
@@ -62,6 +62,8 @@ class Base(ABC):
                 **gen_conf)
             for resp in response:
                 if not resp.choices:continue
+                if not resp.choices[0].delta.content:
+                    resp.choices[0].delta.content = ""  
                 ans += resp.choices[0].delta.content
                 total_tokens = (
                     (