json.partial! "commons/success"
json.data do
  json.id  @category_id
  json.name @category_name
  json.total_count @total_count
  json.public_count @public_count
  json.private_count @private_count
  json.course_is_public @course.is_public?
  json.files do
    json.array! @attachments do |attachment|
      json.partial! "attachments/attachment", attachment: attachment
      json.author do
        json.partial! "users/user_simple", user: attachment.author
      end
      json.partial! "files/course_groups", attachment_group_settings: attachment.attachment_group_settings
    end
  end
end