Bug: OpenAi Assistant usage removes function

[demsr]

Bug Description

Using the "OpenAi Assistant" Block with an existing assistant which has a custom function has the result of this function being deleted/removed.

To Reproduce

1. Create Assistant with a function in OpenAi Playground
2. Use Assistant with n8n Block
3. Refresh Assistant in OpenAi
4. Function is deleted

Expected behavior

Using the n8n block should not alter the assistant

Operating System

Ubuntu 22.04

n8n Version

1.27.2

Node.js Version

18.19.0

Database

SQLite (default)

Execution mode

main (default)

[Joffcom]

Hey @demsr,

Thanks for the report, I have followed the steps you have provided and I have not been able to reproduce this. When you say "Use Assistant with n8n Block" what do you mean?

For my test I created a new Assistant and used the get_weather function, I then added the OpenAI node and selected Assistant > Message an Assistant and sent a message, after that I refreshed the Assistants in OpenAI and check it and the function is still there.

I have just quickly checked the code for the OpenAI node and we technically lack the code to delete a function from an Assitant but we can delete the entire assistant so it sounds like maybe something is happening outside of n8n.

[demsr]

Hey @Joffcom,

thanks for the reply. My setup looks like the following, and the "function" is just gone after i run the workflow and refresh the openai assistant page...

[demsr]

After updating to prerelease version 1.29.0 the function is no longer removed. But it also isn't running my function or any other function like "get weather" at all... just responding with text...

[Joffcom]

How are you calling the function? Have you tested the same prompt in the playground and in n8n?

[demsr]

This is my playground response:

and this is the n8n response:

But the important part is, the playground response contains a "function call"

get_weather({ "location": "San Francisco, CA", "unit": "c" }))

which is returned by the openai api to call some other function on my end

[Joffcom]

Hey @demsr,

That looks right to me as you don't have a tool in the output to process the function. You can find an example on how to use the assistant here: https://n8n.io/workflows/2098-chat-with-openai-assistant-by-adding-a-memory/

[pausanchez]

Hey @Joffcom

Seems that the original function in the Assistant is "updated", once the workflow is triggered.

Here is the original function in the Open AI playground before the workflow in n8n is triggered

And here is the same function after the workflow in n8n is triggered

Here is the workflow used:

Hope this helps!

[Joffcom]

Can you share the json for the workflow? We should lack the code to make the change so I suspect OpenAI is changing it to match

[pausanchez]

Hi @Joffcom sure here it is:

{ "name": "Chat with OpenAI Assistant (by adding a memory)", "nodes": [ { "parameters": { "assistantId": "asst_w3oOSRZQoUsUTbxsrTCW4SlG", "text": "Which is the weather in Berlin?", "options": {} }, "id": "087ae6e2-b333-4a30-9010-c78050203961", "name": "OpenAI Assistant", "type": "@n8n/n8n-nodes-langchain.openAiAssistant", "position": [ 1140, 240 ], "typeVersion": 1, "credentials": { "openAiApi": { "id": "johJrN2VFbKtFVqp", "name": "OpenAi account" } } }, { "parameters": { "content": "## Try me out\n1. In the OpenAI Assistant node, make sure your OpenAI credentials are set and choose an assistant to use (you'll need to create one if you don't have one already)\n2. Click the 'Chat' button below\n\n - In the first message, tell the AI what your name is\n - In a second message, ask the AI what your name is", "height": 300.48941882630095 }, "id": "3b72a676-aaa2-472a-b055-1fed03f52101", "name": "Sticky Note4", "type": "n8n-nodes-base.stickyNote", "position": [ 280, 420 ], "typeVersion": 1 }, { "parameters": { "name": "get_current_weather", "description": "Get the current weather", "workflowId": "E8bUghl4j3Tnk4GV" }, "id": "8996f5f7-5be5-4e68-87ad-03822ff9b87a", "name": "Custom n8n Workflow Tool", "type": "@n8n/n8n-nodes-langchain.toolWorkflow", "typeVersion": 1, "position": [ 1060, 480 ] }, { "parameters": {}, "id": "192e7948-9bf0-4298-81b7-f51dc57bc843", "name": "Execute Workflow Trigger", "type": "n8n-nodes-base.executeWorkflowTrigger", "typeVersion": 1, "position": [ 1180, 700 ] }, { "parameters": { "jsCode": "return {\n 'response': {\"temperature\":\"30 degrees celsius\"}\n}" }, "id": "7238d43a-f4bb-494d-a0fe-9212f892dfb2", "name": "Code", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 1420, 700 ] }, { "parameters": { "httpMethod": "POST", "path": "17df09fd-1835-4fe5-b20f-074b9ccac653", "responseMode": "responseNode", "options": {} }, "id": "a31409a5-766f-4ac4-afe8-d4c38cdc5cde", "name": "Webhook", "type": "n8n-nodes-base.webhook", "typeVersion": 1.1, "position": [ 880, 260 ], "webhookId": "17df09fd-1835-4fe5-b20f-074b9ccac653" }, { "parameters": { "options": {} }, "id": "944542cb-c867-48a7-a4a7-75a1fc717a5d", "name": "Respond to Webhook", "type": "n8n-nodes-base.respondToWebhook", "typeVersion": 1, "position": [ 1520, 240 ] } ], "pinData": { "Webhook": [ { "json": {} } ] }, "connections": { "OpenAI Assistant": { "main": [ [ { "node": "Respond to Webhook", "type": "main", "index": 0 } ] ] }, "Custom n8n Workflow Tool": { "ai_tool": [ [ { "node": "OpenAI Assistant", "type": "ai_tool", "index": 0 } ] ] }, "Execute Workflow Trigger": { "main": [ [ { "node": "Code", "type": "main", "index": 0 } ] ] }, "Webhook": { "main": [ [ { "node": "OpenAI Assistant", "type": "main", "index": 0 } ] ] } }, "active": true, "settings": { "saveDataSuccessExecution": "all", "saveManualExecutions": false, "callerPolicy": "workflowsFromSameOwner", "executionTimeout": -1, "executionOrder": "v0" }, "versionId": "d732bd5e-1a93-43d5-b81d-50ce535a2754", "meta": { "templateId": "2098", "templateCredsSetupCompleted": true, "instanceId": "31bb2c205aa65c1befb6f5a8902d0d96a7d208528cbe91e9e075b4ef47dc875e" }, "id": "E8bUghl4j3Tnk4GV", "tags": [] }

[pausanchez]

Could this be related? https://platform.openai.com/docs/api-reference/assistants/modifyAssistant

[Joffcom]

Hey @pausanchez,

That could be it, Looking at the updated node again and it looks lime we might actually only use code_interpreter and retrieval rather than functions. I have created NODE-1171 as the internal dev ticket to look into this further.

[janober]

Fix got released with n8n@1.34.0