Module StateMachine::Integrations::ActiveModel::Observer
In: lib/state_machine/integrations/active_model/observer.rb

Adds support for invoking callbacks on ActiveModel observers with more than one argument (e.g. the record and the state transition). By default, ActiveModel only supports passing the record into the callbacks.

For example:

  class VehicleObserver < ActiveModel::Observer
    # The default behavior: only pass in the record
    def after_save(vehicle)
    end

    # Custom behavior: allow the transition to be passed in as well
    def after_transition(vehicle, transition)
      Audit.log(vehicle, transition)
    end
  end

[Validate]