module AWS::SimpleDB::PutAttributes

def attribute_hashes attributes, replace
  attribute_hashes = []
  attributes.each_pair do |attribute_name,values|
    [values].flatten.each do |value|
      attribute_hashes << { 
        :name => attribute_name.to_s, 
        :value => value.to_s, 
        :replace => replace,
      } unless [:if, :unless].include?(attribute_name)
    end
  end
  attribute_hashes
end

def do_put attribute_hashes, expect_opts = {}
  return nil if attribute_hashes.empty?
  opts = {
    :domain_name => item.domain.name,
    :item_name => item.name,
    :attributes => attribute_hashes,
    :expected => expect_condition_opts(expect_opts)
  }
  opts.delete(:expected) if opts[:expected].empty?
  client.put_attributes(opts)
  nil
end