Ciao @fabiofurlano! 👋 I'm here to help you with any bugs, questions, or contributions while waiting for a human maintainer.

To efficiently pass multiple variables to workflows in your chatbot, you can follow these steps:

1. Define Execution Start Variables: Start by defining the necessary input variables for your workflow. For example, you can define an input variable sys.query for a chatbot.

2. Node Input Variables: Each node in the workflow should have its input variables defined. For instance, if you have a question classifier node, you can define its input variable as sys.query.

3. Reference Upstream Variables: When referencing variables within nodes, ensure that you only reference variables from upstream nodes in the process.

4. Unique Node Names: To avoid variable name conflicts, ensure that each node has a unique name.

5. System-Fixed Output Variables: Note that the output variables of nodes are generally system-fixed and cannot be edited.

Here is an example of how you might define and pass variables in a workflow:

# Define start variables
start_node:
  input_variables:
    - sys.query
    - sys.user_id

# Define a question classifier node
question_classifier_node:
  input_variables:
    - sys.query
  output_variables:
    - classified_question

# Define another node that uses the output of the question classifier
response_generator_node:
  input_variables:
    - classified_question
  output_variables:
    - response

Additionally, you can use the WorkflowVariablesConfigManager class to convert workflow start variables to a list of VariableEntity objects. This is done by finding the start node and iterating over the user input form to append each variable to the list:

from core.app.app_config.entities import VariableEntity
from models.workflow import Workflow

class WorkflowVariablesConfigManager:
    @classmethod
    def convert(cls, workflow: Workflow) -> list[VariableEntity]:
        """
        Convert workflow start variables to variables

        :param workflow: workflow instance
        """
        variables = []

        # find start node
        user_input_form = workflow.user_input_form()

        # variables
        for variable in user_input_form:
            variables.append(VariableEntity(**variable))

        return variables

By following these steps, you can efficiently pass multiple variables through your workflow, ensuring smooth and complex processing logic ^[1][2].

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