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# frozen_string_literal: true
require "active_support/core_ext/module/delegation"
# Attachments associate records with blobs. Usually that's a one record-many blobs relationship,
# but it is possible to associate many different records with the same blob. If you're doing that,
# you'll want to declare with <tt>has_one/many_attached :thingy, dependent: false</tt>, so that destroying
# any one record won't destroy the blob as well. (Then you'll need to do your own garbage collecting, though).
class ActiveStorage::Attachment < ActiveRecord::Base
self.table_name = "active_storage_attachments"
belongs_to :record, polymorphic: true
belongs_to :blob, class_name: "ActiveStorage::Blob"
delegate_missing_to :blob
# Purging an attachment will purge the blob (delete the file on the service, then destroy the record)
# and then destroy the attachment itself.
def purge
blob.purge
destroy
end
# Purging an attachment means purging the blob, which means talking to the service, which means
# talking over the Internet. Whenever you're doing that, it's a good idea to put that work in a job,
# so it doesn't hold up other operations. That's what +purge_later+ provides.
def purge_later
ActiveStorage::PurgeJob.perform_later(self)
end
end
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