class ActiveModel::Serializer

def embed(type, options={})


embed :ids, :include => true # Embed the association ids and include objects in the root
embed :ids # Embed only the association ids
embed :objects # Embed associations as full objects

Define how associations should be embedded. 
def embed(type, options={})
  self._embed = type
  self._root_embed = true if options[:include]
end