Export Rails model to CSV

model_to_csv.rb

# Export Active Record model as a CSV file
#
def self.render_csv active_record_model
  CSV.generate do |csv|
    csv << active_record_model.column_names
    active_record_model.all.each do |m|
      values = active_record_model.column_names.map{ |f| m.send f.to_sym } 
      csv << values
    end
  end
end