how to set up custom field selectbox where the list take from group

[henro]

i have 4 group in my site.
1. activity
2. Patient Care
3. Administrator
4. Food and Diet

each contact can only follow one group,
so i want to create a custom field where the list in that custom field take from those group(s).

i see default a field in civicrm contact, but it allow contact follow more one group


any one experienced for this case ?

thanks and best regards

[ayduns]

You could create a custom field with those 4 values and then create 4 smart groups based on that field.  Those with access to those admin screens need to know to change your custom field rather than add groups directly.

[petednz]

i may be misunderstanding but if you want a form where visitors or admins can be forced to only add a contact to one out of 4 groups, you could do it on a webform and set the widget to be a radio button i believe

[henro]

thanks a lot ayduns and petednz

i will try your suggestion

regards