unknown variant `function`, expected one of `system`, `user`, `assistant`, `tool`

[springrain]

Describe the bug unknown variant function, expected one of system, user, assistant, tool

Error message openai.UnprocessableEntityError: Failed to deserialize the JSON body into the target type: messages[1].role: unknown variant function, expected one of system, user, assistant, tool

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System:

• OS: Windows 11
• GPU/CPU: AMD X86_64
• Haystack version (commit or version number):2.3.0

[Amnah199]

Hi @springrain, could you please provide more context around this error? Sharing the code snippet that's causing the issue would also be helpful.

[lbux]

Tools usage (which includes function calling) is not properly implemented into Haystack. The use of function is deprecated for OpenAI and ChatMessage does not yet support tool

[Amnah199]

Thank you for the clarification. A PR (check it out) is currently open in the haystack-experimental to address this issue. Once it's finalized, you’ll be able to test it. If the implementation is successful, it will be integrated into Haystack in a future release.

[anakin87]

@springrain can you post a code example to reproduce the error?