Paperclip + S3: Migrating existing files from one :path format to another

Question

I have a model with a avatar paperclip attach. It has now a plain standard path

has_attached_file :avatar,
  :path => \"/:id-:style-:filename\"
<         


        

Answer 1

This rake task should do the trick. I tried it with aws-sdk 1.5.2 and ruby 1.9.3p194.

The new_key should map to your new paperclip path. Don't forget to set :acl according to your needs.

namespace :data do
  desc 'aws images migration'
  task :migrate_images do |t, args|
    s3 = AWS::S3.new(:access_key_id => 'XXX', :secret_access_key => 'XXX')
    bucket = s3.buckets['your-bucket-name']
    bucket.objects.each do |object|
      new_key = object.key.gsub(........)
      new_object = bucket.objects[new_key]
      object.copy_to new_object, {:acl => :public_read}
    end
  end
end

The original file should be deleted manually or using a similar task, once you are sure the new file is correct.