User.import_csv(params[:file].path)

CsvImportJob.perform_async(URI.parse(params[:file].path))

def perform(file_path)

  User.import_csv(file_path)

end

» 10 Aug 2015 13:56:26.596 2015-08-10 11:56:25.987726+00:00 app worker.1 - - 3 TID-oqvt6v1d4 ERROR: Actor crashed!
» 10 Aug 2015 13:56:26.596 2015-08-10 11:56:25.987728+00:00 app worker.1 - - Errno::ENOENT: No such file or directory @ rb_sysopen - /tmp/RackMultipart20150810-6-14u804c.csv
» 10 Aug 2015 13:56:26.596 2015-08-10 11:56:25.987730+00:00 app worker.1 - - /app/vendor/ruby-2.2.2/lib/ruby/2.2.0/csv.rb:1256:in `initialize'

require 'open-uri'

class ProcessCsvJob < ActiveJob::Base
  queue_as :default

  def perform(csv_path)
    csv_file = open(csv_path,'rb:UTF-8')

    SmarterCSV.process(csv_file) do |array|
        .... code here for processing ...
    end
  end

end

def import_csv(file)
  CSV.foreach(file.path, headers: true) do |row|
    new_user = { email: row[0], password: row[1] }
    CsvImportJob.perform_async(new_user)
  end
end