Condition on optional field

[MichaelStetner]

I'm trying to validate some YAML that looks like this:

person:
  name: Sam
  employed: true
  jobtitle: Engineer

The rules are:

• "jobtitle" is only allowed if "employed" is true.
• "employed" is optional
• if "employed" is absent, treat it the same as "employed: false"

I tried writing the following cue to validate it:

person: closed({
    name: string
    employed?: bool
    if employed == true {
        jobtitle: string
    }
})

This works fine as long as "employed" is present. So the example at the top validates, and so does this:

person:
  name: Sam
  employed: false

But I get an error when I try to validate this:

person:
  name: Sam

The error message from cue vet is

person: cannot reference optional field: employed:
    ./test.cue:4:8

Is there something I could write in cue to make this validate?

[slewiskelly]

Either of the following should work:

#Person: {
	name: string
} | {
	name:     string
	employed: bool

	if employed == true {
		jobtitle: string
	}
}

#Person: {
	name:      string
	employed?: bool

	if employed != _|_ {
		if employed == true {
			jobtitle: string
		}
	}
}

[MichaelStetner]

Thanks! That works.

Just for my understanding, why does this fail?

if employed != _|_ && employed == true 

(My intuition was that the logical operator && would be equivalent to nesting if statements)