RUBY

how to write CSV file in rails

require 'csv'
file = "my_file.csv"
CSV.open( file, 'w' ) do |writer|
  @coun.each do |c|
    writer << [c.name, c.country_code, c.user_id, c.subscriber_id]
  end
end

generate csv file rails

def csv_cars
  headers = ['column one', 'column two', 'column three']

  csv_data = CSV.generate(headers: true) do |csv|
    csv << headers
    csv << ["A", "B", "C"]
  end

  send_data csv_data, filename: "data-#{Date.today.to_s}.csv", disposition: :attachment
end