class ActiveModel::Serializer::Association::HasMany

def build_serializer(object, options = {})
  if @serializer_class && !(@serializer_class <= ArraySerializer)
    @options[:each_serializer] = @serializer_class
    @serializer_class = ArraySerializer
  else
    @serializer_class ||= ArraySerializer
  end
  super
end

def initialize(name, *args)
  super
  @root_key = @embedded_key
  @key ||= "#{name.to_s.singularize}_ids"
end