ruby readline csv file and create new file with sth

gistfile1.rb

require 'csv'

task :token  do
    require "./config/boot.rb"
    res_file = File.new("db/token.txt","w+") # create res file
    CSV.foreach("db/token.csv") do |row|
      access_token = row.split(';')[0] #  get first element
      oauth_token = OauthToken.first(:access_token => access_token)
      if oauth_token
        client_id = oauth_token.client_id
        client = Client.first(id: client_id)
        res_file.puts("#{client.try(:name)}, #{client_id}, #{access_token}")
      end
     end
     res_file.close
    puts "import end :) !"
  end