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Fixed an unhandled error that was raised when DynamoDB did not have any chat history. (#6141)

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The current version of chat history with DynamoDB doesn't handle the
case correctly when a table has no chat history. This change solves this
error handling.

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Fixes https://github.com/hwchase17/langchain/issues/6088

#### Who can review?

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@hwchase17

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Shu 2023-06-19 07:39:19 +07:00 committed by GitHub
parent 2286204354
commit 46782ad79b
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langchain/memory/chat_message_histories/dynamodb.py
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@ -44,6 +44,7 @@ class DynamoDBChatMessageHistory(BaseChatMessageHistory):
"""Retrieve the messages from DynamoDB""" """Retrieve the messages from DynamoDB"""
from botocore.exceptions import ClientError from botocore.exceptions import ClientError
response = None
try: try:
response = self.table.get_item(Key={"SessionId": self.session_id}) response = self.table.get_item(Key={"SessionId": self.session_id})
except ClientError as error: except ClientError as error: