Lazily Resolved GraphQL

lazy_resolver.rb

# app/graphql/ticket_resolver.rb
class TicketResolver
  def initialize(id)
    @id = id
  end
  
  def ticket
    if @ticket
      @ticket
    else
      @ticket = BackendTicketService.fetch(@id)
    end
  end
end

# app/graphql/app_schema.rb
AppSchema = GraphQL::Schema.define do
  ... # normal GraphQL setup 

  lazy_resolve(TicketResolver, :ticket)
end