There are times when we are working on something in a rails console, and we need to push the data out to a .csv file, for any future reference.

The below sample of code can help you achieve the same easily.

require 'csv' # Require the CSV library, since we'll be manipulating a CSV file.

file = "#{Rails.root}/public/csv_file.csv"  # a file to add the data into

versions = ActiveRecord::Base.connection.execute 'select item_id, item_type from versions;'  # your data to be written to the file

column_headers = %w[item_id item_type], 'w', write_headers: true, headers: column_headers) do |writer|
  versions.each do |version|
    writer << [version['item_id'], version['item_type']]

And done!