WebMantras

1. Difference between string and text in Rails?
2. How to split routes.rb into smaller files?
3. Listing out parent then children
4. Rails – How to ReCreate the database
5. Upgrade Rails project from 3.0 to 3.1
6. Rails, how to replace all 2+ white spaces with &nbsp?
7. How do I add a jquery plugin to rails 3.1?
8. Rails: update_attribute vs update_attributes

The delete methods bypass the various Active Record callback and validation functions, while the destroy methods ensure that they are all invoked. In general, it is better to use the destroy methods if you want to ensure that your database is consistent according to the business rules defined in your model classes.

1. Rails 3 and Rich text editor
2. How to add a before_filter in UserMailer which checks if it is OK to mail a user?
3. Working on a legacy Rails application
4. “data-type” argument in link_to
5. Generating a report by date range in Rails
6. How do I change the title of a page in Rails?
7. Mongrel vs. WEBrick
8. How can I write to Rails logger within my gem?
9. Rails: two sites – one database
10. Correct Way to Set Default Values in Rails

1. Best way to create random DateTime in Rails
2. How to properly work with jQuery in Rails 3.1 asset pipeline?
3. WEBrick: RequestURITooLarge: should I update or use a different server?
4. Running 2 websites off of same Rails codebase?
5. Best Zip Code Plugin for Ruby
6. Capitalize only first character of string and leave others alone?
7. How to load a Javascript asset depending on controller/action?
8. How to avoid tons of commits when debugging Heroku app?
9. How to add CSRF Protection to forms created in javascript?
10. How to delete all contents of a folder with Ruby / Rails?
11. ActionMailer password security

A few Stack Overflow questions I found helpful:

1. Using Rails 3.1, where do you put your “page specific” javascript code?
2. Connecting Rails 3.1 with Multiple Databases
3. Adding HTML5 offline support to a Rails 3.1 app
4. Explain to me how config works in Rails
5. How can I start my Ruby environment from scratch? 
6. How do you access a Ruby on Rails Rails.root.join yml file from the console?
7. How can I programaticaly fill out a remote form with data from another form using Rails?
8. Load seed data in Rails 3 Project
9. What does a member and collection route mean?
10. Rails Namespace vs. Nested Resource
11. render partial object vs locals

I wanted to parse an Excel spreadsheet stored on Amazon S3 (AWS::S3) using the Spreadsheet gem.

I spent a lot of time trying to get this to work and was not able to find a good example anywhere on the internet so here is the code snippet:

Related:
How can I upload and parse an Excel file in Rails?