Subflow use

[xaviermehaut]

Hi,
I try to use the subflow feature in Langflow... This feature is really nice to decompose a quite complex workflow... unfortunately it is not working as i thought... I don't actually understand which subflow input and output are exposed in the calling flow. What are the rules? and moreover, how i could choose the input or output I want to expose properly? Evey attempt I did to try do do this was unsuccessfull :-(

I think a proper chapter in the dcoumentatio could be useful, or even better an example..

regards

[dosubot[bot]]

Hi @xaviermehaut! I'm here to help you with any issues or questions you have about Langflow. Let's work together to solve this subflow problem.

To properly expose subflow inputs and outputs in Langflow, follow these steps:

1. Expose Inputs:

   • Use the get_flow_inputs function to retrieve all inputs from the graph of the selected flow.
   • Add these inputs to the build configuration using the add_inputs_to_build_config method. This method processes each input vertex, modifies its display name and name, and adds it to the build configuration.

2. Expose Outputs:

   • Define outputs in the outputs attribute of the SubFlowComponent class. For example, outputs can be defined as [Output(name="flow_outputs", display_name="Flow Outputs", method="generate_results")].

Rules for Selecting Inputs and Outputs to Expose:

• Inputs are selected based on the vertices in the graph that represent input nodes. The add_inputs_to_build_config method ensures that only relevant inputs are added by filtering out unnecessary fields like "code" and "_type".
• Outputs are predefined in the outputs attribute and are generated by the generate_results method, which processes the flow's run outputs and builds data from the result data.

This setup ensures that the inputs and outputs are properly exposed and configured for use in Langflow ^[1][2][3].

To continue talking to Dosu, mention @dosu.

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[xaviermehaut]

Thanks for the answer ; unfortunately i didn't understant it :-(