Use after_commit instead of after_create for Resque jobs.

store.rb

  # Redis is faster than Mysql so it may cause a RecordNotFound to happen if enqueued from after_create
  before_create :set_recently_opened
  after_commit :if => :recently_opened? do |record|
    Resque.enqueue StoreAfterCreate, record.id
    UserMailer.store_signup(record.owner_user_id, record.id).deliver
  end

  def set_recently_opened
    @recently_opened = true
  end
  
  def recently_opened?
    @recently_opened    
  end