How to implement upload txt file in Rails?

Question

Ruby on Rails

Hello.
How to implement upload txt file from local computer folder in Rails project? Nothing was googled ... Can you tell me a gem or can it be somehow implemented using standard tools? I want to first understand the example of one file, but ideally, you need to implement the uploading of all files from a local folder, followed by processing each file. I hope for the help of the local gurus)

Answer 1

Recommended: carrierwave Popular
alternative : paperclip

Answer 2

Dir.glob("/path_to_folder/*.txt") do |text_file|
  File.open(text_file, "w+") do |f|
     #обработка файла
  end
end