Loading CSV files using Rails 3.0.3

While watching the Falcons vs Bucs game on NFL Instant Replay on the NFL Network (that channel absolutely rocks), I decided to take up a challenge and build a very simple RoR app that uploads a CSV file that contains a list of Cities and corresponding zipcodes and store it in a database. The app will have simple CRUD operations for City/Zipcode as well as an upload view for uploading the file to the server. From the start I decided to have two controllers (one for CRUD'ing the City/Zip and one for Uploading the file). And here we go...