asdf

<script type="text/javascript">
  window.SERVICES = <%= raw ActiveModel::ArraySerializer.new(@services).to_json %>
  window.SERVICE_SUBCATEGORIES = <%= raw ActiveModel::ArraySerializer.new(@service_subcategories).to_json %>
</script>

service_serializer.rb

class ServiceSerializer < ActiveModel::Serializer
  embed :ids, include: true

  attributes :id, :name, :input_type, :placeholder

  def placeholder
    object.placeholder || ""
  end

  has_many :service_subcategories
end

store.js.coffee

ClientDashboard.Adapter = DS.RESTAdapter.extend
  bulkCommit: false

ClientDashboard.Adapter.configure 'ClientDashboard.ServiceSubcategory',
  sideloadAs: "service_subcategories"

ClientDashboard.Adapter.map 'ClientDashboard.Service',
  service_subcategories: { key: "service_subcategory_ids" }

ClientDashboard.Adapter.reopen
  namespace: 'users'

ClientDashboard.Store = DS.Store.extend
  adapter: ClientDashboard.Adapter.create()
  init: ->
    @_super()
    @loadMany ClientDashboard.Service, window.SERVICES
    @loadMany ClientDashboard.ServiceSubcategory, window.SERVICE_SUBCATEGORIES