Connecting to Oracle from Rails

Since there are several variations of docs on this (some of which are out of date) I figured I'd document this.

1. Download and install the Ruby interface from http://rubyforge.org/projects/ruby-oci8/
2. Then, in your config/database.yml file, you should have something like this:

development:
  adapter: oracle
  database: SID
  host: //HOST:PORT
  username: YOURUSERNAME
  password: YOURPASSWORD

If you're running Rails with JRuby you should have the Oracle JDBC drivers in the classpath and the entry above will be a little different:

common: &shared
   adapter: jdbc
   driver: oracle.jdbc.driver.OracleDriver
   url: jdbc:oracle:thin:@HOST:PORT:SID
   username: YOURUSERNAME
   password: YOURPASSWORD

# oracle (JDBC)
development:
   <<: *shared