Radio buttons in list?

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How would I go about adding radio buttons into a list.

For example say I had a list of telephone numbers and I wanted to add a radio button to the side of each number called primary. So the user could only select one primary.

One option is to use checkboxes and some form of boolean struct to fill values. However just wondering if there are alternate methods?

Regards

[benmonro]

I would look at using a custom factory (i.e. a react component that follows some rules). https://github.com/gcanti/tcomb-form/blob/master/GUIDE.md#custom-factories