I have two chains, one that generates a document and one that creates a short document resume. I want to chain them, using the output from the first on inside the other one. But I want to get both outputs in the result. Before LCEL, I could do it using LLMChain's output_key parameter. With LCEL, there seems to be a RunnablePassthrough class, but I don't seem to get how to use it to aggregate the output. Code example: generate_document_chain = generate_document_prompt | llm | StrOutputParser() resume_document_chain = resume_document_prompt | llm | StrOutputParser() aggregated_chain = generate_document_chain | resume_document_chain content = aggregated_chain.invoke({"topic": topic}) Continue reading...
