Validate a field depending on another field value in Symfony

Question

I have two related fields in a Symfony form: object_status and cryopreservation_method.

The first one cannot be null and stores one of three p

Answer 1

You have to create a conditional validator. This can be done using a sfValidatorCallback (easier than creating a new validator). Check this example of the Symfony Cookbook (is for 1.2 but works in 1.4).