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Fix ChatMessageHistory (#9594)

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The initialization of the array of ChatMessageHistory is buggy.
The list is shared with all instances.
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Philippe PRADOS 2023-08-22 16:36:36 +02:00 committed by GitHub
parent fba29f203a
commit d4c49b16e4
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1 changed files with 2 additions and 2 deletions
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4
libs/langchain/langchain/memory/chat_message_histories/in_memory.py
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@ -1,6 +1,6 @@
from typing import List
from langchain.pydantic_v1 import BaseModel
from langchain.pydantic_v1 import BaseModel, Field
from langchain.schema import (
BaseChatMessageHistory,
)
@ -13,7 +13,7 @@ class ChatMessageHistory(BaseChatMessageHistory, BaseModel):
Stores messages in an in memory list.
"""
messages: List[BaseMessage] = []
messages: List[BaseMessage] = Field(default_factory=list)
def add_message(self, message: BaseMessage) -> None:
"""Add a self-created message to the store"""