Optional Value Error: in input form must be a valid number

[miyagipipi]

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Dify version

Version 0.11.1

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

I set a optional number variable。 When I run without this variable, dify reports an error and displays "word_num in input form must be a valid number". Word_num is my number variable name. My dify version is 0.11.1 and i had read https://github.com/langgenius/dify/pull/10529. I hope that the unfilled optional variable can be handled correctly here. (ex set it null?)

✔️ Expected Behavior

unfilled optional number variable can be set as null or default?

❌ Actual Behavior

unfilled optional number variable in input form must be a valid number

[dosubot[bot]]

@miyagipipi Hello! I'm here to help you with any bugs, questions, or contributions while you wait for a human maintainer. Let's tackle this issue together!

To handle an unfilled optional number variable in Dify version 0.11.1, you can set it to None or a default value. The code in code_node.py shows that when a variable is not provided, it is set to None:

variables[variable_name] = variable.to_object() if variable else None

Additionally, the _check_number method allows None as a valid value for a number variable:

def _check_number(self, value: Union[int, float], variable: str) -> Union[int, float]:
    if not isinstance(value, int | float):
        if value is None:
            return None
        else:
            raise OutputValidationError(f"Output variable `{variable}` must be a number")
    ...

This means that if the variable is not filled, it will be set to None and will not cause an error. If you want to set a default value instead of None, you can modify the code where the variable is assigned:

variables[variable_name] = variable.to_object() if variable else default_value

Replace default_value with the desired default number ^[1].

To continue talking to Dosu, mention @dosu.

[crazywoola]

Can't reproduce.

[miyagipipi]

@crazywoola I know the reason about this error. First i input a number in this optional variable, then i delete it and run. In this case, this error happen, and the variable becomes empty string.