Langserve RemoteRunnable Error

[conaku]

I am invoking RemoteRunnable to remote langserve instance that hosts a chain_with_guardrail and facing error. When I call the invoke method on chain without guardrail then it works fine.

Server Side

chain = (
{"context": reranking_retriever, "question": RunnablePassthrough()}
| prompt_template
| llm
| StrOutputParser()
)

chain_with_guardrails = guardrails | chain

add_routes(
app,
chain_with_guardrails,
path="/conversational_ai_with_rag_text_chat"
)

Client Side

llm = RemoteRunnable("http://127.0.0.1:90000") | StrOutputParser()
llm.invoke("Tell me something about Langchain")

this invoke method is erroring out if the langserve chain is having "chain_with_guardrails" but not erroring with just chain

Error

pydantic.v1.error_wrappers.ValidationError: 1 validation error for Generation
text
str type expected (type=type_error.str)

[conaku]

Update the client side code to

def text_chat(message, history):
output = llm.invoke({"query": message})
return output

Still getting below error message

pydantic.v1.error_wrappers.ValidationError: 1 validation error for Generation
text
str type expected (type=type_error.str)

[conaku]

This issue is resolved. output is a dictionary and not string so i had to extract the string from the dictionary