With Symfony2 how can I get the form validator to require at least one of a set of fields?

Question

I have a from where you can fill in any combination of your home, cell, or work phone numbers.

How can I get the validator to require that at least one is filled in without requiring any of the fields individually?

Answer 1

You have at least two options:

• Create a custom validation constraint,
• Or use the callback constraint.