uRaNGaTaNG » extension http://www.rngtng.com Featuring Ruby, Rails, Web development, Arduino, Processing, Nabaztag and more... Thu, 12 Jan 2012 10:08:01 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 What? – irb extension gem to find your methods http://www.rngtng.com/2010/09/24/what-irb-extension-gem-to-find-your-methods/ http://www.rngtng.com/2010/09/24/what-irb-extension-gem-to-find-your-methods/#comments Fri, 24 Sep 2010 11:35:38 +0000 admin http://urangatang.wordpress.com/?p=10

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If Samuel just would have asked me, I got an answer:

Oldies, but Goldies: ‘Methodfinder’ is a really nice extension for your ruby/rails irb and shipped with the ‘what_methods’ gem. I’m using quite a lot and can’t go without it anymore (aka. I’m too stupid to remember all those method names ;-) .

gem install what_methods

http://redhanded.hobix.com/inspect/stickItInYourIrbrcMethodfinder.html

See more hints by Dr. Nic blog here

]]> http://www.rngtng.com/2010/09/24/what-irb-extension-gem-to-find-your-methods/feed/ 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!? ;-)

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