Gateway stopped sending subscription data without wrapping scalar value

[Santinell]

At first I faced with a problem described in #370
As recommended I wrapped my data and this:

extend type Subscription {
  onUpdate(project: ObjectID): JSONObject
  onCreate(project: ObjectID): JSONObject
  onRemove(project: ObjectID): JSONObject
}

became this:

type Event {
  data: JSONObject
}

extend type Subscription {
  onUpdate(project: ObjectID, types: [String]): Event
  onCreate(project: ObjectID, types: [String]): Event
  onRemove(project: ObjectID, types: [String]): Event
}

where JSONObject is scalar type from graphql-scalars.

When issue #370 was closed, I tried to change my schema back
and faced with another problem - gateway stopped sending data on subscription.
Of course for test I changed: 1. schema 2. resolver 3. query for subscribing.
Could it be that fix #508 added support only for simple scalar values like strings and numbers?

By the way gateway printing this in console:
Scalar with variable inputs detected for parsing AST literals. This is not supported.
I am not sure if it's connected.

[mcollina]

I'm pretty sure it's connected. However i don't have much time to investigate/fix this. Would you like do send a PR?

[Santinell]

Ok, I'll try to investigate this problem, but it would take a while.