Question

I want to ensure that one of two form fields representing a boolean value is checked. But there is no appropriate constraint to do this. nullable: false does not work.

class Organisation {

    Boolean selfInspecting

    static constraints = {
        selfInspecting(nullable: false)
    }

}

How can I check whether one of the two fields is checked or not?

Answer 1

You can also check this in the Controller, e.g.

if (params.checkBox1 != 'on' && params.checkBox2 != 'on')
  flash.error = 'At least one value must be checked.'
  return ...