[BUG] Troubles with DynamoDB integration

[LucasKnudsen]

Describe the bug
I'm attempting to setup memory with the DynamoDB Chat Memory integration.
However, it does not seem to create any entries in the database. I have attached a couple screenshots to help visualise the issue.
As shown, there is indeed Scan and DeleteItem (odd?) activity, which means that the connection is live.

What am I doing wrong here?
Related to #370 and #454
@govind-kumarr

Expected behavior
I expect some sort of Chatlog record to be stored in the appointed Table.

Screenshots

[lima-zulu]

Experienced the same thing. The conversation is stored in the local SQLite but not in DynamoDB.

[meehow-m]

the issue is related to:

https://github.com/FlowiseAI/Flowise/blob/main/packages/components/nodes/chains/ConversationalRetrievalQAChain/ConversationalRetrievalQAChain.ts

line 182:

mapChatHistory returns ChatMessageHistory interface but BufferMemoryExtended is expected. which means connection is dropped and DynamoDB does not save anything. I'm building knowledge around langchain-js so need some time to fix it but at least root cause was identify.

BufferMemoryExtended {
  chatHistory: DynamoDBChatMessageHistory {
    lc_serializable: false,
    lc_kwargs: {},
    lc_namespace: [ 'langchain', 'stores', 'message', 'dynamodb' ],
    tableName: 'flowise',
    sessionId: '123',
    client: DynamoDBClient { middlewareStack: [Object], config: [Object] },
    partitionKey: 'id',
    sortKey: undefined,
    messageAttributeName: 'messages',
    dynamoKey: { id: [Object] }
  },
  returnMessages: true,
  inputKey: 'question',
  outputKey: 'text',
  humanPrefix: 'Human',
  aiPrefix: 'AI',
  memoryKey: 'chat_history',
  isSessionIdUsingChatMessageId: true,
  sessionId: '123'
}

result:

[HenryHengZJ]

this PR should fix that - #1025
try to update to latest v1.3.8, feel free to re-open if issue persist