Unselect other selected items if I selected "None" in multiple select

[Melvin_Managbanag]

Hi good afternoon, Im new to ODK and Im sorry for this newbie question.

1. What is the issue? Please be detailed.
I just want to unselect a selected options if I select "None"

Thank you

[Ronald_Munjoma]

Hi @Melvin_Managbanag

Welcome to the GetODK Community and forum, when you get a chance please introduce yourself.

Have a look at these forum threads:

If user selects "none" in multiple select, prevent selection of other options

Hi and welcome, @Mosab_English! Please be sure to post a new topic if you have a new question. If you think a topic may be related, please link to it rather than responding to the topic. A constraint is exactly what you want in this case. A user will not be able to save the form until a constraint is satisfied so although they could have an answer that is not valid initially, they will need to fix it before the form can be completed. There are a few examples of constraints you can use in past …

Creating contraints on select_multiple

Hi all, For question with select_multiple (below), I'd like to create a constraint so that if someone either enters a 88 or 99, they can not select any other answer choice. list-name value label use 1 use choice #1 use 2 use choice #2 use 3 use choice #3 use 4 use choice #4 use 5 use choice #5 use 6 use choice #6 use 88 Refuse use 99 Don't know I think this post,http://bit.ly/1yj4MHn, had the solution, but none of my …

[Melvin_Managbanag]

Hi @Ronald_Munjoma

Thank you Sir I was able to solve my problem with the constraint

if(selected(${item_name},"None"), count-selected(.)=1, true())