How to integrate this machine into Rails models about finite_machine HOT 5 CLOSED

Hi Ilya,

The generic idea will be to do similar thing to docs, that is, use target to specify external context and then in callbacks instrument the AR instance to persist it's state etc... See thread for similar discussion. In summary, I'm gonna be working to release a version this weekend that fully works with target object and test it against active record!

from finite_machine.

I've released v0.2.0 that allows for easy integration with any object including ActiveRecord. See integration section for further details. Let me know how you getting on with this?

from finite_machine.

Thank you for clearing this up. I see now that the machine is quite standalone, and I'm supposed to plug it into models the DIY way.

from finite_machine.

You can even go further than my example and have for example Account to be your pure AR state storage and AccountManager class that actually takes an account instance

class Account < ActiveRecord::Base; end
class AccountManager
  attr_accessor :account  
  def initiailize(account)
    @acount = account
  end
  def manage
     @manage = FiniteMachine.define do
        target account
      end
  end
end

account = Account.new
manager = AccountManager.new(account)
manager.manage.debit_account # puts account into :debit state etc...

Possibilities are endless! The sweet part is that in future if you decide to use some other ORM you can do it very easily without much hassle, as a side effect you can test your machine separately from the model itself. Once you implement your solution you can send me pull request so that we can add it to readme?

from finite_machine.

Yes, I never said a standalone machine is bad, it's actually quite the opposite, and you did a fantastic job here! If/when I use it in production, I will let you know. Won't be easy. I work in a team and we currently use the state_machine gem everywhere. Lots of typing/testing to replace.

from finite_machine.