如何使用rails carrierwave在后台上传文件？

Question

I'm currently using the gem Carrierwave to upload files to my AWS s3 account. But I will be uploading some large files, so I'm worried about the server timing out and the user having to wait. Anyone have any suggestions to move this to a background job and how to accomplish that? I've looked at sidekiq but am lost trying to figure out where to start. When I try to implement it the file doens't seem to upload even though it gives a success in Rails .

Answer 1

there's a gem carrierwave_backgrounder to help you queue your file uploads in the background

add gem carrierwave_backgrounder to your Gemfile and bundle it

Add a initializer file config/initializers/carrierwave_backgrounder.rb to configure your background processor. Something like this if you're using sidekiq

CarrierWave::Backgrounder.configure do |c|
  c.backend :sidekiq, queue: :carrierwave
end

Then, use it on your models along with your carrierwave uploader

class User < ActiveRecord::Base
  mount_uploader :avatar, AvatarUploader
  process_in_background :avatar
end

IMPORTANT! You should define :carrierwave queue in config/sidekiq.yml

:queues:
  - [carrierwave, 1]
  - default

Sidekiq Queues Configuration

Answer 2

The best way is to use Carrierwave Direct as it bypasses the rails server completely. You can then do actual processing as a background task (I recommend Sidekiq, but use whatever you want.)