AASM Gem broken by Rails 2.3.2?

Has anyone had any problems using the AASM state machine Gem with Rails 2.3.2? It was working fine for me but is now giving a NoMethodError:

NoMethodError (undefined method `state' for #<Comment:0x25cb8ac>):
  /usr/local/lib/ruby/gems/1.8/gems/rubyist-aasm-2.0.5/lib/persistence/active_record_persistence.rb:231:in `send'
  /usr/local/lib/ruby/gems/1.8/gems/rubyist-aasm-2.0.5/lib/persistence/active_record_persistence.rb:231:in `aasm_read_state'
  /usr/local/lib/ruby/gems/1.8/gems/rubyist-aasm-2.0.5/lib/persistence/active_record_persistence.rb:135:in `aasm_current_state'
  /usr/local/lib/ruby/gems/1.8/gems/rubyist-aasm-2.0.5/lib/persistence/active_record_persistence.rb:156:in `aasm_ensure_initial_state'
 app/controllers/comments_controller.rb:12:in `create'

Here's the relevant code from my model that uses AASM:

class Comment < ActiveRecord::Base
  include AASM
  belongs_to :post          
  after_create :spam_check

  aasm_column :state
  aasm_initial_state :submitted
  aasm_state :submitted
  aasm_state :approved
  aasm_state :rejected

  aasm_event :ham do
    transitions :to => :approved, :from => [:submitted, :rejected]
  end

  aasm_event :spam do
    transitions :to => :rejected, :from => [:submitted, :approved]
  end     

  private          
  def spam_check
    # Invoke Askismet to see if the comment is spam...
  end
end

Note that I have the state column in my comments table.

Any ideas why it no longer works?

Solution

Uh, you need a field in your comments table called 'state'. You defined it using aasm_column :state. This is not a Rails 2.3.2 bug! :D