Auto-select (and hide) radio question choice if only a single choice is visible

[davidmurray]

This would be necessary in order to "cleanly" fix issues https://github.com/chairemobilite/od_mtl_2023/issues/395 and https://github.com/chairemobilite/od_mtl_2023/issues/563

[davidmurray]

@tahini Any idea how to implement this in the best way? You are more familiar with the Evolution codebase than I am :)

[tahini]

I have no easy solution for now unfortunately, as choices and conditional are 2 fields of the widget itself. And both are called in quite different places (the redux action and the widget render). Ideally, if the conditional could know about choices, get the choices and auto-select the choice if only one, but ti doesn't cleanly know about that...

This would require some core changes to do... In the survey itself though, one can extract the applicable choices, function that is called in the choices field and the conditional. The conditional addtionally checks the number of applicable choice elements.

But if you drop the "hide" requiremenet, the InputRadio component could simply add the select={true} if there's only one choice and make sure to call the onValueChange with that choice's value.

[davidmurray]

This would require some core changes to do... In the survey itself though, one can extract the applicable choices, function that is called in the choices field and the conditional. The conditional addtionally checks the number of applicable choice elements.

Seems like a good solution for now. Considering the huge backlog of issues in od_mtl_2023, I think we should go with this. :) Thanks

[kaligrafy]

Is this fixed by #592?

[davidmurray]

Kind of but it’s a bit of a hack. Ideally there would be a better way to do this directly in evolution