Suppose I have this class (taken directly from the aasm documentation):
class Job < ActiveRecord::Base include AASM aasm do state :sleeping, :initial => true state :running state :cleaning event :run do transitions :from => :sleeping, :to => :running end event :clean do transitions :from => :running, :to => :cleaning end event :sleep do transitions :from => [:running, :cleaning], :to => :sleeping end end end
I don’t really like the fact that I have my definition of a state machine mixed with my definition of a class (since, of course, in a real project I will add more methods to the Job class).
I would like to separate the definition of the state machine in the module so that the Job class can be something along the line:
class Job < ActiveRecord::Base include StateMachines::JobStateMachine end
Then I created a job_state_machine.rb file in app / models / state_machines with content similar to:
module StateMachines::JobStateMachine include AASM aasm do state :sleeping, :initial => true state :running state :cleaning event :run do transitions :from => :sleeping, :to => :running end event :clean do transitions :from => :running, :to => :cleaning end event :sleep do transitions :from => [:running, :cleaning], :to => :sleeping end end end
but this does not work, because AASM is included in the module not in the Job class ... I even tried to change the module to:
module StateMachines::JobStateMachine def self.included(base) include AASM aasm do state :sleeping, :initial => true state :running state :cleaning event :run do transitions :from => :sleeping, :to => :running end event :clean do transitions :from => :running, :to => :cleaning end event :sleep do transitions :from => [:running, :cleaning], :to => :sleeping end end end end
but still it doesn’t work ... any hint or suggestion is greatly appreciated.
Thanks Ignazio
EDIT:
Thanks to Alto, the correct solution is the following:
module StateMachine::JobStateMachine def self.included(base) base.send(:include, AASM) base.send(:aasm, column: 'status') do .... end end end
and obviously don't forget to include the definition of the main computer in the main class as follows:
include StateMachine::JobStateMachine