Where or where has my session gone?


I’m implementing the Encrypter class as described in Agile Web
Development with Rails, and I’m having some problems getting it to

1 I need to get to the session where I’ve stored some related key
data, but I keep getting a missing_method error when trying to
retrieve what I need.
2. When using the breakpointer (I’m on Ruby 1.8.6), the model
parameter [as in after_save(model)] shows undefined.

Any thoughts on what I’m missing here?