class Project < ActiveRecord::Base has_and_belongs_to_many :developers, :uniq => true has_many :topics # :finder_sql => 'SELECT * FROM topics WHERE (topics.project_id = #{id})', # :counter_sql => 'SELECT COUNT(*) FROM topics WHERE (topics.project_id = #{id})' has_many :replies, :through => :topics do def find_recent(params = {}) with_scope :find => { :conditions => ['replies.created_at > ?', 15.minutes.ago] } do find :all, params end end end end