custom scalar Object is coerced to empty object

[mohitjaimini9]

Hi Team,

I have used custom scalar Object/Json to receive a input json in the mutation. Use case is to keep value field a generic once where Any custom json object can be sent.

type Entry {
  key: String!
  value: Object!
}

type Mutation {
     saveEntry(entry: Entry!): Object!
}

Example mutation call looks like following:

mutation {
    saveEntry(entry : {
        key: "order",
        value: {
            id: "123",
            type: "mobile"
            payment: {
                method: "Cash"
                amount: "1212"
            }
        }
  })
}

I have also defined customHooks as follows:

override fun willGenerateGraphQLType(type: KType): GraphQLType? = when (type.classifier as? KClass<*>) {
    Any::class -> graphqlObjectType
    JsonObject::class -> ExtendedScalars.Json
    else -> null
}

After doing all this, In mutation handler, i receive an empty object {} in value field. Can you please help me understand how can this be resolved ?

[dariuszkuc]

Hello 👋

Hooks are used to specify various schema transforms. What you are looking for is a runtime behavior update to allow parsing this input. You would need to create custom data fetcher that correctly parses arguments (see #1520 for examples).

Thanks,
Derek