fix from_defaults erasing summary buffer history (#13325)

run-llama · May 7, 2024 · 83c8e78 · 83c8e78
1 parent ce95bd7
commit 83c8e78
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/llama-index-core/llama_index/core/memory/chat_summary_memory_buffer.py b/llama-index-core/llama_index/core/memory/chat_summary_memory_buffer.py
@@ -87,8 +87,9 @@ def from_defaults(
             token_limit = DEFAULT_TOKEN_LIMIT
 
         chat_store = chat_store or SimpleChatStore()
-        chat_history = chat_history or []
-        chat_store.set_messages(chat_store_key, chat_history)
+
+        if chat_history is not None:
+            chat_store.set_messages(chat_store_key, chat_history)
 
         summarize_prompt = summarize_prompt or SUMMARIZE_PROMPT
         return cls(