Using a custom argument authentication option in GraphQL-Ruby

argument_auth_example.rb

require "bundler/inline"

gemfile do
  gem "graphql", "2.5.7"
end

class MySchema < GraphQL::Schema
  class BaseArgument < GraphQL::Schema::Argument
    def initialize(*args, authenticate_with: nil, **kwargs, &block)
      @authenticate_with = authenticate_with
      super(*args, **kwargs, &block)
    end

    def authorized?(obj, value, ctx)
      self.loads.public_send(@authenticate_with, value) && super
    end
  end

  class BaseField < GraphQL::Schema::Field
    argument_class(BaseArgument)
  end

  class BaseObject < GraphQL::Schema::Object
    field_class(BaseField)
  end

  class Thing < BaseObject
    field :name, String

    def self.top_secret?(thing)
      thing[:name].include?("ABCD")
    end
  end

  class Query < BaseObject
    field :thing, Thing do
      argument :id, ID, loads: Thing, authenticate_with: :top_secret?, as: :thing
    end

    def thing(thing:)
      thing
    end
  end

  def self.object_from_id(thing_id, ctx)
    { name: "Thing #{thing_id}"}
  end

  def self.resolve_type(abs_type, obj, ctx)
    Thing
  end

  query(Query)
end

pp MySchema.execute("{ thing(id: \"ABCD\") { name } }").to_h
# {"data" => {"thing" => {"name" => "Thing ABCD"}}}

pp MySchema.execute("{ thing(id: \"HIJK\") { name } }").to_h
# This fails `.top_secret?`
# {"data" => {"thing" => nil}}