Add example how to validate than one field matches another

I cannot find any example or appropriate function in the API how to make sure that one field has the same value as another (string in my case). Use case matching password and passwordRepeat fields.

I’m thinking I need to use ref, but I’m not sure how exactly. I was thinking of matches (but can I pass exact field value there) or oneOf.

yup.object().shape({
  newPassword: yup.string().min(5).required().label('New password'),
  reNewPassword: yup.string(),
});

[TimonVS]

The example that @jquense posted isn’t working for me. This is what worked for me:

password: yup.string().required('Password is required'),
confirmPassword: yup.string().oneOf([yup.ref('password'), null], "Passwords don't match").required('Confirm Password is required'),

I got it from https://github.com/jquense/yup/issues/164

[yantakus]

@chodorowicz This can be just:

string().oneOf([this.state.model.password], "Passwords don't match")