undefined local variable or method for delayed_job - ruby-on-rails

Question

I'm trying to modify my existing callback on a App model to be executed via delayed job. I am getting a error undefined local variable or method app_name for main:Object, when deleted an app.
app/models/app.rb
# == Schema Information
#
# Table name: apps
#
# id :integer not null, primary key
# name :string(255)
# created_at :datetime
# updated_at :datetime
# app_type :string(255)
# package_name :string(255)
# icon :string(255)
#
# app/models/app.rb
class App < ActiveRecord::Base
has_many :versions, dependent: :destroy
app/models/version.rb
class Version < ActiveRecord::Base
DEFAULT_ICON_URL = 'placeholder_med#2x.png'
belongs_to :app
delegate :name, :id, :users, :app_type, to: :app, prefix: true
after_create :notify_subscribers
before_destroy :remove_stored_files
scope :since, ->(time) { where('created_at > ?', time) }
def updated_or_created_at
updated_at || created_at
end
def display_icon
if icon_url.blank? || icon_url.match(/default.png/)
DEFAULT_ICON_URL
else
icon_url
end
end
def main?
version_type == 'main'
end
def release_notes?
!release_notes_url.blank?
end
private
def notify_subscribers
AppMailer.notify_new_build(id)
end
def remove_stored_files
Delayed::Job.enqueue(DeleteAppFilesJob.new(app_name, version_number, build_number), priority: 1, run_at: 5.minute.from_now)
end
end
app/jobs/delete_app_files_job.rb
class DeleteAppFilesJob < Struct.new(app_name, version_number, build_number)
def perform
remove_stored_files(app_name, version_number, build_number)
end
protected
def remove_stored_files(app_name, version_number, build_number)
S3_BUCKET.objects.select { |obj| obj.key.match(%r{(ios|android)/#{app_name}/#{version_number}/#{build_number}}) }.each do |obj|
puts "Deleting #{obj.key}"
obj.delete
end
end
end

Answer 1

To create an anonymous Struct (which you generally want when subclassing like that), you pass Symbol arguments to Struct.new:
class DeleteAppFilesJob < Struct.new(:app_name, :version_number, :build_number)
You're trying to pass variables that don't exist, hence the "undefined local variable or method" error.