positive numbers only - formik/yup schema

Question

I made such a schema:

const schema = yup.object().shape({

    seats: yup
      .number()
      .label('seats')
      .required('pls enter'),
  });

Additionally, I want to check that the number is positive or greater than 0. Is there any way I can add such a condition into the schema?

Answer 1

You can use the test() method and add a custom validation there:

number: Yup.number()
  .required('ERROR: The number is required!')
  .test(
    'Is positive?', 
    'ERROR: The number must be greater than 0!', 
    (value) => value > 0
  )

https://github.com/jquense/yup#mixedtestname-string-message-string--function-test-function-schema

Answer 2

You can use .positive() and also .min(1)

const schema = yup.object().shape({

    seats: yup
      .number()
      .positive()
      .label('seats')
      .required('pls enter')
      .min(1),
  });

Answer 3

Actually Yup provides this out of the box with: https://github.com/jquense/yup#numberpositivemessage-string--function-schema