Simply Rich Authenticator using Rails 2.0.2

This is a mini Rails App that uses RESTful authentication and Acts as State Machine to implement: 1. Signup 2. Activation 3. Forgot Password 4. Reset Password 5. Change Password Download it here. Code is available under Rails MIT license. You can check out the code from: svn checkout *http*://simply-rich-authenticator.googlecode.com/svn/trunk/simply-rich-authenticator-read-only Happy New Year! P.S: I have fixed the file size problem. So enjoy the screencast.

Pimp My AWDwR Depot App - Revised Rails 2.0

Download the screencast on how to get the depot app in Agile Web Development with Rails to work with Rails 2.0

How to develop plugins in Rails - Part 4

In this episode we will revisit the include and extend and learn how it is used when
developing Rails plugins. Download it now : How to develop plugins in Rails - Part 4

Rolling with Ruby on Rails Revised - Rails 2.0

Onlamp.com article now is upgraded to use the Rails 2.0 features. You will see
the new features in action. Download the screencast Rolling with Ruby on Rails Revised - Rails 2.0. Source code from here. Duration: 25 mins. Size: 200 MB.

class_eval and instance_eval in ruby

Download it class_eval and instance_eval in Ruby.

How to develop Rails Plugins - Part 3

We will review all the files created by the plugin generator. Download now How to Develop plugins in Rails - Part 3

send method in Ruby

Download the screencast on send method in Ruby.

How to develop ActiveResource client and server in Rails 2.0

Download the screencast how to develop ActiveResource client and server in Rails 2.0.

eval and binding in Ruby

Download the screencast on eval and binding in Ruby.

How to develop Rails plugins - Part 2

Available now, download How to Develop Rails Plugins - Part 2.

How to develop Rails plugin - The Basics

Now available, download How to Develop Rails Plugin - The Basics

Alias in Ruby

Learn about alias method in Ruby

Upgrading RubyGems to 1.0.1

If the sudo gem update --system hangs then try:

sudo gem install rubygems-update
sudo update_rubygems

This successfully installed Rubygems 1.0.1 on my Powerbook G4. Old version was 0.9.1

Require Vs Load in Ruby

Learn about require and load in Ruby.

Modules in Ruby

Learn how to use Modules in Ruby.

Recursion in Ruby

Now available, download recursion in Ruby.

Include Vs Extend in Ruby

Learn all about include and extend in Ruby. Here is include vs extend in Ruby.

Time Management for Software Engineers

Today I read the book 4 hour workweek by Timothy Ferriss. While I am not totally convinced by his business ideas, I definitely learned a lot about time management. Check it out in your local library or book store.

Upgrading to Rails 2.0.2

If you are getting the following error during upgrade of Rails:

ERROR: While executing gem ...(OpenURI::HTTPError)
404 Not Found

1. sudo gem update --system.
This will upgrade the Ruby gems to 0.9.5

2. sudo gem install rails --source http://gems.rubyonrails.org
Note that gem install -y is the default, so you don't have to provide it.

Class_Eval in Ruby

Here is the screencast download link for learning about class_eval in Ruby.

How to install Rails 2.0.1 in Cent OS

gem install rails -y --source http://gems.rubyonrails.org --no-rdoc --no-ri

No documentation will be installed on the production, saves disk space. source option is used if you have difficulties installing.

Ruby Blocks Part 3

Ruby Blocks Part 3 Screencast on Symbol and Blocks in Ruby:

Ruby Blocks Screencast - Part 2

The duration is 19 mins. It covers ampersand, closure and other concepts. Download Ruby Blocks - Part 2

Data Migration using ActiveRecord

If you are using ActiveRecord to create new records while you are migrating from a old database, use new instead of create when you want to use the same primary key. Because create does not allow you change the primary key.

Migrations chapter in AWD

The book shows an example of how to use data only migrations. The problem with this approach is that you have to write code for every table you want to populate. A better way to do it is to use the Rick Olsen's rake task found in the Beast source code.

This allows you to add data to any number of tables using just one task. It basically loads the data using fixtures. The fixture files are created under bootstrap folder in fixtures directory.

I still don't get it when the book has an example of irreversible migration and just raises the exception. What if I just want to continue migrating downwards without stopping at the irreversible migration?