module Shrine::Plugins::Recache

  1. lib/shrine/plugins/recache.rb

The recache plugin allows you to process your attachment after validations succeed, but before the attachment is promoted. This is useful for example when you want to generate some versions upfront (so the user immediately sees them) and other versions you want to generate in the promotion phase in a background job.

plugin :recache
plugin :processing

process(:recache) do |io, context|
  # perform cheap processing

process(:store) do |io, context|
  # perform more expensive processing

Recaching will be automatically triggered in a “before save” callback, but if you're using the attacher directly, you can call it manually:

attacher.recache if attacher.changed?