Optional results should return null values

[d4rken]

I have a query where the result has optional values

e.g.

    data class SomeData(
        val requiredResult: String,
        val optionalResult: String? = null
    )

type {
    optionalResult: String
    requiredResult: String!
}

Querying this gives me

{
  "data": {
    "someQuery": {
      "requiredResult": "somedata"
    }
  },
  "errors": [],
  "dataPresent": true
}

Clientside, using apollo-client, I didn't get my data. I stumpled upon the same issue here:

apollographql/apollo-client#4267

which suggests that the graphql spec forbids just omitting values and instead we should return:

    "someQuery": {
      "requiredResult": "somedata",
      "optionalResult": null,
    }

[d4rken]

Nvm this works correctly in graphql-kotlin.

[d4rken]

The issue is my json serializer removing the null value.