Simple example of validator returning FailResult throws Cannot extend enumerations error

[widgetface]

I wondered if anyone could assist me, I have a custom validator and whenever I return a FailResult , I get an error ‘Cannot extend enumerations’

Here is a basic example , can anyone suggest why I am getting an error ?

input_validator.py

    def _validate(self, value: str, metadata: Dict[str, Any] = {}) -> ValidationResult:
        return FailResult(
            error_message="Value must be exactly two words",
            fix_value="",
        )

[widgetface]

My apologies , the issue arose because I used

Guard().use(input_validator.InputValidator(on_fail=OnFailAction))

I should have used

Guard().use(input_validator.InputValidator(on_fail="exception"))

[CalebCourier]

No problem, was just about to write back. Glad you have it figured out!

[CalebCourier]

Also just to be clear, the following should be valid and equivalent to your second example:
Guard().use(input_validator.InputValidator(on_fail=OnFailAction.EXCEPTION))

[widgetface]

Excellent thanks for your time