I'm working on a UI where there are multiple roles, with two (Finance and Legal) that are constrained to only support one user.
I'm using a fairly standard matrix, with checkboxes that become editable upon clicking an 'edit' link
Since unlike a radio button where choices are mutually exclusive, I was wondering if instead of surfacing an error message upon Submitting, if there's a more effective selection device. I'm relying on some hint text saying '1 user' right now to indicate the constraint.
I'm wondering if there's a better way out there.
Any feedback is much appreciated.