Upload CSV stream from Ruby to S3

Question

I am dealing with potentially huge CSV files which I want to export from my Rails app, and since it runs on Heroku, my idea was to stream these CSV files directly to S3 when gen

Answer 1

s3 = Aws::S3::Resource.new(region:'us-west-2')
obj = s3.bucket.object("#{FOLDER_NAME}/#{file_name}.csv")
file_csv = CSV.generate do |csv|
    csv << ActionLog.column_names
    ActionLog.all.each do |action_log|
      csv << action_log.attributes.values
    end
  end
  obj.put body: file_csv

file_csv = CSV.generate is to create a string of CSV data in Ruby. After creating this string of CSV, we put to S3 using bucket, with the path

#{FOLDER_NAME}/#{file_name}.csv

In my code, I export all the data to an ActionLog model.