Error: Mesage dict must contain

[haimh]

I've tried new version of information-gather-prompting.ipynb

Link: https://github.com/langchain-ai/langgraph/blob/main/examples/chatbots/information-gather-prompting.ipynb

When I run the graph with code bellow:
.....
user_question = messages[-1].content
inputs = { "messages": [HumanMessage(content=user_question)] }

async for event in chatbot.astream_events(
inputs,
config,
stream_mode="updates",
version="v2"
):
...

it throw out errors show bellow:

ValueError: Message dict must contain 'role' and 'content' keys, got {'messages': [HumanMessage(content='What could you do?', id='950572ce-d259-41fa-9c21-c70a3d88365c')]}

I've using the packages dependencies as followings:

langchain-chroma = "^0.1.2"
langchain = "^0.2.12"
langchain-community = "^0.2.11"
langchainhub = "^0.1.20"
langgraph = "^0.2.3"
langgraph-checkpoint-sqlite = "^1.0.0"

Have you got any ideas or suggestion for workaround this issues?

Thank in advance.
Richard

[nikithakriz]

I've tried new version of information-gather-prompting.ipynb

Link: https://github.com/langchain-ai/langgraph/blob/main/examples/chatbots/information-gather-prompting.ipynb

When I run the graph with code bellow: ..... user_question = messages[-1].content inputs = { "messages": [HumanMessage(content=user_question)] }

async for event in chatbot.astream_events( inputs, config, stream_mode="updates", version="v2" ): ...

it throw out errors show bellow:

ValueError: Message dict must contain 'role' and 'content' keys, got {'messages': [HumanMessage(content='What could you do?', id='950572ce-d259-41fa-9c21-c70a3d88365c')]}

I've using the packages dependencies as followings:

langchain-chroma = "^0.1.2" langchain = "^0.2.12" langchain-community = "^0.2.11" langchainhub = "^0.1.20" langgraph = "^0.2.3" langgraph-checkpoint-sqlite = "^1.0.0"

Have you got any ideas or suggestion for workaround this issues?

Thank in advance. Richard

Facing the same error. Did you able to fix this?

[haimh]

Yeap! You should use the latest version at link bellow:

https://github.com/langchain-ai/langgraph/blob/main/examples/chatbots/information-gather-prompting.ipynb

In this version, the author already fixed this issues! Pay close atttention to the function in each node (should replaced the MessageGraph with StateGraph mechanism as well!)

Hope that help.
Richard.