是的，验证输入依赖

Question

Hi all I have following validation:

const questionAddValidation = Yup.object().shape({

  questions: Yup.array().of(
    Yup.object({
      question: Yup.string().required().min(100)
       
      level: Yup.string().required().when("question", {
                 is: (value) => value.length > 0,
                 then: Yup.string().required(),
              }),

      answers: Yup.array().of(
        Yup.object({
          answer: Yup.string().required().min(1).when("question", {
                 is: (value) => value && value.length > 0,
                 then: Yup.string().required(),
              }),
        })
      ),
    })
  ),

What I want to do is that if user will type something in question input for other inputs should work yup required() method.

I try following:

  is: (value) => value.length > 0

But it not working, Unhandled Rejection (TypeError): Cannot read property 'length' of undefined can u please help me to resolve this problem?

Answer 1

You just remove required() before when

 level: Yup.string().when("question", {
    is: (value) => value.length > 0,
    then: Yup.string().required(),
 }),