If I use jRuby, Ruby on Rails, and JDBC, can I still use an ORM?

Question

Can I use Hibernate, for example? Active Record? I have to use jdbc for an older database so I have to use jRuby with Ruby on Rails. Thank you.

Answer 1

Using ActiveRecord should be possible, see instructions here.

You can also use Hibernate directly by using JRuby's Java interface, or maybe with some Ruby sugar.

Answer 2

I am using JDBC and Active Record on JRuby in parallel. In my Rails application I have done it like this:

• the activerecord-jdbc module to connect to the database. This is my default

database.yml
development:
adapter: jdbc
driver:
url:
username: user
password: pass
(test and production accordingly)

• some stuff is accessed via JDBC, the connection is retrieved through this:

ActiveRecord::Base.connection.instance_variable_get(:@connection)