I've been devloping in Coldfusion for the last 3-4 years.. I'm looking into Ruby on Rails and was wonding how I can join tables in my database.
Look at the :includes option for the finder methods of ActiveRecord::Base.
Alternately, you can always invoke manual SQL queries with find_by_sql.
Also, if I delete a Ex. Post, how can I make sure it deletes the comments...?
See :dependent=>:destroy in ActiveRecord::Base to do it in rails; you could also tell your database to do it on_delete if your database permits.