sort artifact

Author: leehuwuj

python/llama-index-server/llama_index/server/api/utils/chat_request.py

@@ -4,11 +4,13 @@
 
 
 def get_artifacts(chat_request: ChatRequest) -> List[Artifact]:
-    return [
+    """Return a list of artifacts sorted by their creation time. Artifacts without a creation time are placed at the end."""
+    artifacts = [
         Artifact.from_message(message)  # type: ignore
         for message in chat_request.messages
         if Artifact.from_message(message) is not None
     ]
+    return sorted(artifacts, key=lambda a: (a.created_at is None, a.created_at))
 
 
 def get_last_artifact(chat_request: ChatRequest) -> Optional[Artifact]: