Carrierwave + S3 image processing

image.rb

# Image model with ImageUploader mounted on image attribute

class Image < ActiveRecord::Base
  mount_uploader :image, ImageUploader
  
  def process_image!(versions = [])
    return unless self.image.file.exists?
  
    hosted_image.should_process = true
  
    hosted_image.cache_stored_file!
    hosted_image.retrieve_from_cache!(hosted_image.cache_name)
    hosted_image.recreate_versions!(*versions)
  
    self.processed = true
    save(validate: false)
  end
end