When submitting the model parameter in the useChat body, the received value is not the latest

[shanksgx]

TanStack AI version

v.0.2.2

Framework/Library version

v.0.2.2

Describe the bug and the steps to reproduce it

When submitting the model parameter in the useChat body, the received value is not the latest。@tanstack/ai-react

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

https://tanstack.com/ai/latest/docs/api/ai-react

Screenshots or Videos (Optional)

const chatOptions = React.useMemo(
    () =>
      createChatClientOptions({
        id: `${model}_${new Date().getTime()}`,
        connection: fetchServerSentEvents('/api/tanchat'),
        body: { model },
        // todo Tools
      }),
    [model],
  )
  console.log("🚀 ~ AiChat ~ chatOptions:", chatOptions)

  const {
    messages,
    sendMessage,
    isLoading: isStreaming,
    stop,
    // reload,
    clear
  } = useChat(chatOptions)

Do you intend to try to help solve this bug with your own PR?

None

Terms & Code of Conduct

• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.

[nauvalazhar]

I've faced the same issue, and ended up using this approach instead:

const { ... } = useChat({
  connection: {
    connect: (m, body, signal) => {
      const updatedBody = {
        ...body,
        ...bodyRef.current,
      };

      return fetchServerSentEvents("/api/chat").connect(
        m,
        updatedBody,
        signal,
      );
    },
  },
});