init.rb 702 Bytes
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# monkey patch to add comments on action_tracker

Rails.configuration.to_prepare do
  ActionTracker::Record.module_eval do

  has_many :comments, :class_name => 'Comment', :foreign_key => 'source_id', :dependent => :destroy,
    :finder_sql => Proc.new { %Q{SELECT * FROM comments WHERE #{conditions_for_comments} ORDER BY created_at ASC}},
    :counter_sql => Proc.new { %Q{SELECT COUNT(*) FROM comments WHERE #{conditions_for_comments}} }

    def conditions_for_comments
      type, id = (self.target_type == 'Article' ? ['Article', self.target_id] : [self.class.to_s, self.id])
      "source_type = '#{type}' AND source_id = '#{id}' AND spam IS NOT TRUE AND reply_of_id IS NULL"
    end

  end
end