If you are living on edge and you are using Rails3 then you need follow this. Rails3 With JRuby
Recently i have started a Rails3 application which will use Jruby.
I have gone through some of the steps for that application up and running.
To update RVM and get the Jruby-1.6.0 installed
rvm update # But if you are already on the latest RVM then you will get message the "rvm update has been removed". #To install Jruby rvm install jruby
After installing Jruby you need to switch your environment to Jruby
rvm use jruby #Using /Users/arunagw/.rvm/gems/jruby-1.6.0
Can check by using
~~>jruby -v jruby 1.6.0 (ruby 1.8.7 patchlevel 330) (2011-03-15 f3b6154) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_22) [darwin-x86_64-java] ~~>ruby -v jruby 1.6.0 (ruby 1.8.7 patchlevel 330) (2011-03-15 f3b6154) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_22) [darwin-x86_64-java]
Now you are ready to play with Jruby stuff.
You can do some basic stuff like irb to test things
irb #IRB will also work jirb # JIRB will also work
Time to install Rails in Jruby environment
gem install rails #Will also work jruby -S gem install rails
All set. Create your Rails application.
rails new my_app
Above command will create a rails application but not useful for Jruby platform.
For all setting just run
rails new my_app -m http://jruby.org/rails3.rb
This will do all setup for you for a rails3 app in Jruby.
You may need to change/update your Gemfile for your gems.
Problems i faced.
rake db:create will give you an error if you are using Mysql with Jruby.
uninitialized constant Mysql::Error
Here is the ticket information about this.
Solution for this problem right now is to create database manually.
After that all will work. No more hurdles i found.
If you got in any problem let me know. We will try to solve that together.
Links may be useful to find stuff