Select TWO from answer choices

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1

Hello,

this might be a stupid question, but I don't know the answer yet:

I know the function select_one and select_multiple.

I want that two choices from a list can be selected. I can write this in the hint, but to make sure that not more than two choices are selected, it would be nice if this cannot even be done.

select_two does not seem to work....

What could be a solution?

Thank you very much!

2

Hi,

You can use "count-selected(.)<=2" in the constraint column.

For more detailed examples of constraints used in select_multiple you can check this link: Multiple selection validation

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3

Thank I was going to post the same answer.
look at http://opendatakit.org/help/form-design/binding/ for more.