Callbacks not working.

[Gurpartap Singh]

I tried it as simple as `around_transition :perform_some_action` as well as after and before callbacks with :on => :some_event, and :from_state => :to_state.

No clue why the method isn't being called. Using Rails 3.2.3 on Postgres 9.1.3.

[Gurpartap Singh]

I tried observers. The default active record callbacks are successfully invoked. However, state_machine's transition callbacks aren't. Kind of frustrated for having no clue where I'm doing it wrong.

class VehicleObserver < ActiveRecord::Observer

  # ActiveRecord callback.

  def after_save(vehicle)

    100.times { puts "This works!" }

  end

  # Generic state_machine transition callback *after* the transition is performed.

  def after_transition(vehicle, transition)

    100.times { puts "This doesn't work!" }

  end

end

And the observer is enabled with `config.active_record.observers = :vehicle_observer` in application.rb.

[Gurpartap Singh]

Just realized that for the callbacks to be called, you must invoke them by updating the "state_event" param, instead of the "state" param.

[Gurpartap Singh]

.. which requires an event as the value of the param, instead of the state name, as obvious.

[Aaron Pfeifer]

Hey Gurpartap -

That's correct -- simply changing the state value doesn't trigger anything within state_machine because there's really no indication as to what event has caused that state to change.  To play it safely, you should always change states by using events so that the rules of the state machine are followed.

Glad you were able to figure this one out!

Best,

Aaron