thin wrapper around Hash that allows us to lazily load session id into session_options
# File lib/action_dispatch/middleware/session/abstract_store.rb, line 18 def initialize(by, env, default_options) @by = by @env = env @session_id_loaded = false merge!(default_options) end
# File lib/action_dispatch/middleware/session/abstract_store.rb, line 25 def [](key) if key == :id load_session_id! unless key?(:id) || has_session_id? end super end