Process connection_type after resolved

Question

I use graphql gem 1.8.11.

My UserType has notifications connection field and if it is queried I'd like to perform some operation (read! in example below).

Example below performs the operation for all of association field. Even if notifications field has pagination parameter and not all of notifications are queried, the operation is performed for all notifications.

How can I perform the operation only for queried nodes?

module Types
  class UserType < Types::BaseObject
    implements GraphQL::Relay::Node.interface

    field :id, ID, null: false
    field :notifications, NotificationType.connection_type, null: true

    global_id_field :id


    def notifications
      object.notifications.tap { |o| o.read! }
    end
  end
end

score 0 · Accepted Answer · answered Dec 17 '18 at 03:45

I ended up to customize connection class.

app/graphql/types/notification_type.rb:

module Types
  class NotificationType < Types::BaseObject
    #
    # existing code
    #

    class << self
      def connection_type_class
        @connection_type_class ||= Types::NotificationConnectionType
      end
    end
  end
end

app/graphql/types/notificaiton_connection_type.rb:

module Types
  class NotificationConnectionType < GraphQL::Types::Relay::BaseConnection
    def nodes
      super.map(&:read!)
    end
  end
end

Process connection_type after resolved

1 Answers1