Store two versions of a file at once using Carrierwave - ruby-on-rails

Question

I'm using Carrierwave and Fog gems to store a file to my Amazon S3 bucket (to /files/file_id.txt). I need to store a slightly different version of the file to a different location in the bucket (/files/file_id_processed.txt) at the same time (right after the original is stored). I don't want to create a separate uploader attribute for it on the model - is there any other way?
This my current method that stores the file:
def store_file(document)
file_name = "tmp/#{document.id}.txt"
File.open(file_name, 'w') do |f|
document_content = document.content
f.puts document_content
document.raw_export.store!(f)
document.save
end
# I need to store the document.processed_content
File.delete(file_name) if File.exist?(file_name)
end
This is the Document model:
class Document < ActiveRecord::Base
mount_uploader :raw_export, DocumentUploader
# here I want to avoid adding something like:
# mount_uploader :processed_export, DocumentUploader
end
This is my Uploader class:
class DocumentUploader < CarrierWave::Uploader::Base
storage :fog
def store_dir
"files/"
end
def extension_white_list
%w(txt)
end
end

Answer 1

This is how my final solution looks like (kinda) - based on Nitin Verma's answer:
I had to add a custom processor method for the version to the Uploader class:
# in document_uploader.rb
...
version :processed do
process :do_the_replacements
end
def do_the_replacements
original_content = #file.read
File.open(current_path, 'w') do |f|
f.puts original_content.gsub('Apples','Pears')
end
end

Answer 2

considering that you need similar file but with different name.
for this you need to create a version for file in uploader.
version :processed do
process
end
and now second file name will be processed_{origional_file}.extension. if you want to change file name of second file you can use this link https://github.com/carrierwaveuploader/carrierwave/wiki/How-to:-Customize-your-version-file-names