I was having some problem with database querying... googled around, and maybe i should remember to come back to this if i were to encounter them again
http://guides.rubyonrails.org/active_record_querying.html
http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html
http://ryandaigle.com/articles/2008/7/7/what-s-new-in-edge-rails-easy-join-table-conditions
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