Suggested solution for cyclic dependencies

[latviancoder]

Lets imagine we have an object with two child objects, but both of them optional.

{
  one: { ... },
  two: { ... }
}

My problem is I have to check for required fields inside of these objects, but only if these objects themselves exist. So I naively tried the following:

    two: object()
        .when('two', {
            is: (two) => typeof two !== 'undefined',
            then: TwoSchema
        })

...and of course got cyclic dependency error.

What I ended up doing was passing 2 additional variables to context: $isOneDefined/$isTwoDefined.
Is there a better approach?

[jquense]

two: yup.lazy(value => value !== undefined ? TwoSchema : object())

?

[latviancoder]

Incredible stuff, thanks for fast answer.