[Bufix] Modify the default value of sessionId when fetching history chat messages.

[melon95]

Background

I used OpenAI's Assistant in ChatFlow and differentiated users based on their chatId.

Then, when I wanted to retrieve the user's chat message history based on the unique chatId, I had to first call /chatmessage/${chatflowid} to get all the historical chat messages. Then, I filtered the chat message based on chatId and obtained the sessionId. After that, I called /chatmessage/${chatflowid}?chatId=${chatId}&sessionId=${sessionId} to retrieve the user's chat message.

💡 Flowise internal sessionId is the threadId returned by Assistant and cannot be overwritten.

⚠️ Calling /chatmessage/${chatflowid} will retrieve all chat messages, which is not ideal.

Reason

The reason for needing to retrieve the chat history of a single user is because when querying the database, if only the chatId is passed, the sessionId will be null.

Code address

Solution

The value of sessionId is no longer related to chatId. This means that when retrieving the history messages of the current chatId, you only need to call the /chatmessage/${chatflowid}?chatId=${chatId} API once.

[automaton82]

Does this fix #1666?

[melon95]

yes. This issue is the same as my needs. @automaton82