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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, touch: true
belongs_to :blob, class_name: "ActiveStorage::Blob"
delegate_missing_to :blob
after_create_commit :analyze_blob_later, :identify_blob
after_destroy_commit :purge_dependent_blob_later
# Synchronously deletes the attachment and {purges the blob}[rdoc-ref:ActiveStorage::Blob#purge].
def purge
delete
blob&.purge
end
# Deletes the attachment and {enqueues a background job}[rdoc-ref:ActiveStorage::Blob#purge_later] to purge the blob.
def purge_later
delete
blob&.purge_later
end
private
def identify_blob
blob.identify
end
def analyze_blob_later
blob.analyze_later unless blob.analyzed?
end
def purge_dependent_blob_later
blob&.purge_later if dependent == :purge_later
end
def dependent
record.attachment_reflections[name]&.options[:dependent]
end
end