Use Paramtools 'when' validator for spouse wages and age

[Peter-Metz]

The goal is to alert CS users that they must enter "Married" for filing status before entering spouse wages or age.

@hdoupe this is a great feature! Is there a way add a custom error message? Or will the CS user be alerted in real time that their input isn't valid?

[hdoupe]

@Peter-Metz this validation isn't done in real-time on the CS frontend. You can use the default ParamTools error message, or you can try to catch errors for the sage and swages parameters and add your own message.

[hdoupe]

this is a great feature!

Thanks dude! I'm glad to see it be used more!

[Peter-Metz]

Thanks Hank! What would the Paramtools default error message say in this case?

[hdoupe]

Hey @Peter-Metz , sorry for the delay on this. The error message would look like this:

[hdoupe]

It would be nice if ParamTools could use custom error message templates. For example, this is the template string for the when validator:

        error_then = (
            f"When {oth_param}{{when_labels}}{{ix}} is {{is_val}}, "
            f"{param_name}{{labels}}{{ix}} value is invalid: {{submsg}}"
        )
        error_otherwise = (
            f"When {oth_param}{{when_labels}}{{ix}} is not {{is_val}}, "
            f"{param_name}{{labels}}{{ix}} value is invalid: {{submsg}}"
        )

[jdebacker]

@Peter-Metz and @hdoupe -- is this PR ready? If we are going to re-launch a Tax-Cruncher web application, how helpful would this be?