Creating a jruby rails project
For some reason, this command:
jruby -S gem install mongrel activerecord-jdbcmysql-adapter railsdidn't install all the required gems I needed.
Manually listing all the basic rails gems needed fixed the problem for me though. Working command:
jruby -S gem install mongrel activerecord-jdbcmysql-adapter rails \ activesupport actionmailer activerecord actionpack activeresource