library · inferred from evidence
invoke
A method for invoking a chain synchronously.
- Error in RootListenersTracer.on_chain_end callback: KeyError('answer') while streaming a RAG chain
Building a conversational RAG chatbot with create_retrieval_chain wrapped in RunnableWithMessageHistory (input_messages_key="input", history_messages_key="chat_history", output_messages_key="answer"). Calling astream() on the chain printed