uRaNGaTaNG » plugin

Rails flag_shih_tzu Plugin with named_scope

tobi — Thu, 20 Aug 2009 17:02:36 +0000

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!?

Quake like Terminal on Mac OS X: Visor Plugin

tobi — Fri, 14 Aug 2009 11:56:01 +0000

Sure you do remember Quake. And sure you di remember how cool the console faded / slided in from the top? Image this would be available for your Mac OS X Console/Terminal. Well now (actually since ages, but I just forgot to mention it is. As small SIMBL plugin called Visor Plugin allows to to bring up the Terminal via a hotkey in anytime. I really love it and can’t without it anymore.
Check it out here: http://visor.binaryage.com/

Extending Active Scaffold as_paperclip_bridge to delete & update image/attachment

tobi — Thu, 13 Aug 2009 15:53:35 +0000

As you know I’m quite fond of working with Active Scaffold (AS) for data administration proposes. Quite recently we moved over to the RoR paperclip attachment plugin for file upload handling. I was even more happy to see a Active Scaffold bridge which integrates paperclip smoothly into AS as well. It’s created by and hosted here on github.

Unfortunately it didn’t provide the possibility to delete or update an image once it’s assigned to an object. Well no problem, another fork of mine, some coding and now it possible. I basically reused to code of the as_file_column_bridge. Check it out here:
~~http://github.com/rngtng/as_paperclip_bridge/tree/master~~

Update: changes got merged into trunk, check it out:

http://github.com/mnaglik/as_paperclip_bridge/