Using Concurrent::Future as return values in GraphQL Ruby

future_lazy_resolve.rb

# app/graphql/types/query_type.rb
Types::QueryType = GraphQL::ObjectType.define do
  name "Query"

  field :ticket, types.String do
    resolve ->(obj, args, ctx) {
      Concurrent::Future.execute do
        BackendTicketService.fetch(1234)
      end
    }
  end
end

# app/graphql/app_schema.rb
AppSchema = GraphQL::Schema.define do
  query(Types::QueryType)

  lazy_resolve(Concurrent::Future, :value!)
end