Field Or

Field_or provides the ability to mark fields in a fieldgroup as exclusive.

What it does:

• Adds a configuration option to the fieldgroup configuration page to make sure that "Users must fill out one field. Multiples not allowed."
• Validates the node submission to make sure that constraints are enforced.

Use case:

Say you have a node teaser where the user can specify either an image thumbnail or a video to display, but not both. Presently, there's no way to act on that. Until now.

How to Use

• Install the module, as well as cck and fieldgroups
• Add a fieldgroup to your content type
• Configure the fieldgroup and select "Users must fill out one field. Multiples not allowed." to enable this module for that fieldgroup.
• Add fields to the fieldgroup