CS8

I’m figuring out something in my rails app.  I’m figuring out which one’s the worst: Eager loading 100 rows of data you don’t actually need at the moment or 10 queries giving 10 result set at once? Here’s the code to explain it. 1 2 3 @event = Event.find(params[:event_id])   @event_attendees = @event.attendees.paginate(:page => params[:page], [...]

Something peculiar happened when I was doing something trivial. If you accidently named your restful route the following resource :roles instead of resources :roles When you point your app to /roles it won’t go to your index controller action but it will instead call your show action.

I had a problem when running git svn command on my ubuntu. Can’t locate SVN/Core.pm in @INC It turns out all I had to do is install libsvn-perl.

I had trouble reindexing the ferret index using the rake command (rake ferret:rebuild). I got this non-descriptive error regarding failing to rebuild it (Even in my development mode). So after googling for it, all one has to do is so simple. Go into your rails script/console and just type Model.rebuild_index And you’re done.

For example: id |category_id | inventory_id 1 384 1 #first entry 2 384 2 #this would be ok. 3 384 1 #this would not be ok To ensure that a category_id doesn’t have any inventory_id duplicate: [sourcecode language="ruby"] class CategoryProduct < ActiveRecord::Base   belongs_to :category   belongs_to :inventory   validates_uniqueness_of :category_id, :scope => :inventory_id end [...]

Well, well, it’s been a month since we wrote… a lot of new stuff’s come out, Our customer required WYSIWYG capability for editing their blogs, which they used There are lots of Javascript editors out there. TinyMCE was one of the coolest I found, with everything you need under the sky for WYSIWYG editing – [...]

A good read on table index. http://www.railway.at/articles/2008/04/24/database-agnostic-database-ignorant Sometimes, it is easy to forget when someone or something else handles it for you. For instance, ActiveRecords. Rails does not  create foreign keys for you. It only creates the primary key. It does not impose constraint on the database level. The association is handled on the application [...]

Do not name your database column with the name ‘no’. You’ll get this error when you try to run your test ActiveRecord::StatementInvalid: Mysql::Error: Unknown column ‘false’ in ‘field list’

If you’re someone who has multiple  git branches on a project and seem to always do git branch to check which branch you’re in. Then here’s how you can make your bash aware of a git branch. Well, I’m not sure if this works on others, but it sure does works in my Ubuntu Hardy. [...]

The beauty of git is there is no one true way to do it. Here’s how the Rails Frameworks maintainers uses git. http://rails.lighthouseapp.com/projects/8994/sending-patches And here’s a wonderful video from Railscast on how to contribute to Rails. http://railscasts.com/episodes/113