uRaNGaTaNG » fork http://www.rngtng.com TobiTobes Tech Weblog featuring Ruby, Rails, Web development, Arduino, Processing, Geekstuff and more... Thu, 01 Jul 2010 11:36:10 +0000 en hourly 1 http://wordpress.org/?v=3.0 Rails flag_shih_tzu Plugin with named_scope http://www.rngtng.com/2009/08/20/rails-flag_shih_tzu-plugin-with-named_scope/ http://www.rngtng.com/2009/08/20/rails-flag_shih_tzu-plugin-with-named_scope/#comments Thu, 20 Aug 2009 17:02:36 +0000 tobi http://www.rngtng.com/?p=200 When it comes to store a load of boolean data into your model you easily end up with lots of columns which blow up your table unnecessarily. The developers at Xing solved this problem with a nifty Rails Plugin called flag_shih_tzu. The trick is to store all boolean values combined as a bit vector, which allows you to put up to 32 values (4Byte) within a single Integer column. Automatic generated access methods allows you to deal with you model as your are used to. Wanna see an example? (Taken from plugin docs)

class Spaceship < ActiveRecord::Base
  include FlagShihTzu

  has_flags 1 => :warpdrive,
            2 => :shields

end

enterprise = Spaceship.new
enterprise.warpdrive = true
enterprise.shields = false
enterprise.save

enterprise.warpdrive? #=> true
enterprise.shields? # => false

Nice, isn’t it?

Unfortunately named scopes where missing for selecting models easily. So another github fork, another fix, and here were are. Now this works as well:

Spaceship.flagged(:warpdrive).not_flagged(:shields).all

Check it out here: http://github.com/rngtng/flag_shih_tzu/tree/master

Update: replaced ‘routes’ with ‘scopes’ – I’m getting confused with that all the time, how come!? ;-)

]]> http://www.rngtng.com/2009/08/20/rails-flag_shih_tzu-plugin-with-named_scope/feed/ 1 My first GitHub fork: bounce-email http://www.rngtng.com/2009/06/05/my-first-github-fork-bounce-email/ http://www.rngtng.com/2009/06/05/my-first-github-fork-bounce-email/#comments Fri, 05 Jun 2009 12:40:12 +0000 tobi http://www.rngtng.com/?p=102 Hurray! I finally forked a github project. Yesterday I ran into the bounce-email gem by Agris Ameriks on Rubyforge. It’s basically a 1:1 port of the PHP Bounce Handler classby Chris Fortune and not very rubyified. Thanks to David Reese, bounce-email is forked on github and I could easily extend it.

I rubyfied the class, did some code cleanup, added (yet a very simple) way to get the original message, and gained some performance by paring message only on demand. A testcase was broken as well the Rakefile, both are fixed. See the update here:
http://github.com/rngtng/bounce-email/tree/master

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