Returning null for a string in a resolver converts it to the empty string in the response

[nikolasburk]

For bug reports, please fill in the next sections:

What is the current behavior?

Consider a resolver function that's set up as follows:

type AuthenticatedEmailUserPayload {
  id: ID
}

extend type Query {
  authenticatedEmailUser: AuthenticatedEmailUserPayload!
}

And implemented like this:

module.exports = function authenticatedEmailUser(event) {
    return {data: {id: null}}
}

The client receives an empty string for the value of id:

{
  "data": {
    "authenticatedEmailUser": {
      "id": ""
    }
  }
}

Please share the relevant part of your project (GraphQL schema, functions, permissions, ...) for easier reproduction

See above

If applicable, share the query, mutation or subscription for reproduction

{
  authenticatedEmailUser {
    id
  }
}

What is the expected behavior?

The client should receive this response:

{
  "data": {
    "authenticatedEmailUser": {
      "id":  null
    }
  }
}

[marktani]

This is fixed now. 🙂