Add attributes to JBuilder collections

add-attrs-to-jbuilder-collections

# this adds an additional `user_ids` array to each of the `organizations` collection

json.organizations do |json|
  json.array! @organizations do |org|
    json.merge! org.attributes
    json.user_ids org.users.pluck(:id)
  end
end

Or more simply, use the embed :ids, include: true syntax...