HappyMapper: Easy XML / Object Mapping for Rubyists
HappyMapper is John Nunemaker's attempt at "making XML fun again" for Rubyists by providing an object to XML mapping library with a succinct syntax. Essentially, you can use HappyMapper to rapidly turn XML into Ruby objects - even nesting them inside and referring to each other. This is powerful stuff. To install, just gem install happymapper
John's own examples are powerful demonstrations of how it works, so check them out. The first is parsing the XML returned from Twitter. The statues and associated users in that XML can be processed (with the relationship maintained) with the following code:
class User include HappyMapper element :id, Integer element :name, String element :screen_name, String element :location, String element :description, String element :profile_image_url, String element :url, String element :protected, Boolean element :followers_count, Integer end class Status include HappyMapper element :id, Integer element :text, String element :created_at, Time element :source, String element :truncated, Boolean element :in_reply_to_status_id, Integer element :in_reply_to_user_id, Integer element :favorited, Boolean has_one :user, User end statuses = Status.parse(xml_string) statuses.each do |status| puts status.user.name, status.user.screen_name, status.text, status.source, '' end
Added: Or.. how about a similar library that doesn't require naming the elements to work (but then lacks typecasting)? Check out xml-object by Jordi Bunster.