# how to define the csv export inside of the model
class User < ActiveRecord::Base
  include Reportable
  
  # override some of the reportable methods
  
  class << self
    
    def report_scope
      # defaults to 'all' but you could do a custom scope like this...
      joins(:addresses)
    end
    
    def csv_builder
      csv = CSVBuilder.new({ resource: self }) do
        column :id
        column :user_id
        column :first_name
        column :last_name
        column("Address")       { |user| user.primary_address.try(:to_str) }
        column :created_at
      end
    end
  end
  
end