class Rails::Generators::SerializerGenerator

def parent_class_name
  if options[:parent]
    options[:parent]
  # Only works on 3.2
  # elsif (n = Rails::Generators.namespace) && n.const_defined?(:ApplicationSerializer)
  #   "ApplicationSerializer"
  elsif defined?(::ApplicationSerializer)
    "ApplicationSerializer"
  else
    "ActiveModel::Serializer"
  end
end