AASM is not working with my rails 3 and ruby 1.8.7 ( undefined method `name' for nil:NilClass )

Question

I'm using Rails 3.2.2, with aasm gem, I have `Document` model this way: ``` class Document < ActiveRecord::Base include AASM aasm do state :unread, :initial => true state :read state :closed event :view do transitions :to => :read, :from => [:unread] end event :close do transitions :to => :closed, :from => [:read, :unread] end end ``` now on my console: ``` ➜ ✗ bundle exec rails c Loading development environment (Rails 3.2.2) irb(main):006:0> Document.create!(:title => 'test') (0.2ms) BEGIN SQL (0.3ms) INSERT INTO `documents` (`aasm_state`, `checklist_id`, `created_at`, `description`, `dir`, `planned_date`, `procedure_id`, `section`, `subsection`, `title`, `updated_at`) VALUES (0, NULL, '2012-06-16 20:03:18', NULL, NULL, NULL, NULL, NULL, NULL, 'test', '2012-06-16 20:03:18') (0.4ms) COMMIT => #

Accepted Answer

I just had the same issue. It arises because by default the state variable is `nil` instead of being set to the initial state. To fix this, in your case, you need to add an accessor on the model, like so:

```
def aasm_state
  self[:aasm_state] || "unread"
end
```

AASM is not working with my rails 3 and ruby 1.8.7 ( undefined method `name' for nil:NilClass )

Solution

Problem