class ActiveModel::Serializer::Association::HasOne

def build_serializer(object, options = {})
  options[:_wrap_in_array] = embed_in_root?
  super
end

def initialize(name, *args)
  super
  @root_key = @embedded_key.to_s.pluralize
  @key ||= case CONFIG.default_key_type
    when :name then name.to_s.singularize
    else "#{name}_id"
  end
end

def serializer_class(object, options = {})
  serializer_from_options || serializer_from_object(object, options) || default_serializer
end