DO NOT EDIT - MOVED TO HERE => <a href="http://wiki.jruby.org/RunningRailsWithFirebird">RunningRailsWithFirebird</a> It has been tested with Jruby 1.1RC2, rails 2.0.2 and activerecord-jdbc-adapter. I supose you have jruby installed, then install rails and activerecord-jdbc-adapter # gem install rails activerecord-jdbc-adapter Then copy [http://www.forniol.cat/wp-content/uploads/2008/03/driver-201-full.jar Firebird-jdbc-adapter.jar] into $JRUBY_HOME/lib Configure your rails application database.yaml like that: <pre> development: adapter: jdbc username: sysdba password: masterkey driver: org.firebirdsql.jdbc.FBDriver url: jdbc:firebirdsql:localhost/3050:database.fdb </pre> <b>NOTE</b>: database.fdb is an alias. In order to setup an alias you have to config aliases.conf located on your firebird configuration folder and do something like that: <pre> # /etc/firebird2/aliases.conf database.fdb = /databases/myblog/myblog.fdb </pre> That’s all you need to work with firebird and rails.