From 1deb0a2d42aca1ebb1fc268ef312775fef966aa3 Mon Sep 17 00:00:00 2001
From: Stephen Hu <stephenhu@seismic.com>
Date: Tue, 5 Aug 2025 11:00:06 +0800
Subject: [PATCH] Fix:local variable 'response' referenced before assignment
 (#9230)

### What problem does this PR solve?

https://github.com/infiniflow/ragflow/issues/9227

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
---
 rag/llm/cv_model.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/rag/llm/cv_model.py b/rag/llm/cv_model.py
index 5f487576e..328591b6d 100644
--- a/rag/llm/cv_model.py
+++ b/rag/llm/cv_model.py
@@ -522,6 +522,7 @@ class GeminiCV(Base):
     def chat_streamly(self, system, history, gen_conf, images=[]):
         from transformers import GenerationConfig
         ans = ""
+        response = None
         try:
             response = self.model.generate_content(
                 self._form_history(system, history, images),
@@ -537,8 +538,10 @@ class GeminiCV(Base):
         except Exception as e:
             yield ans + "\n**ERROR**: " + str(e)
 
-        yield response._chunks[-1].usage_metadata.total_token_count
-
+        if response and hasattr(response, "usage_metadata") and hasattr(response.usage_metadata, "total_token_count"):
+            yield response.usage_metadata.total_token_count
+        else:
+            yield 0
 
 class NvidiaCV(Base):
     _FACTORY_NAME = "NVIDIA"