state_machine in module

[Rob Ui]

Hi,
im trying move state_machine code from class to module, but cant make it work.
Sample code:

module SMtest
  state_machine do
    state :sample
   end
 end

Gives an error:

NoMethodError: undefined method `state_machine' for SMtest:Module

I tried couple things with no luck, is it not possible to put the SM in module or am I missing something?

Thank You,
Rob

[François Beausoleil]

It is, but you have to run your code only after it's been included, such as:

module SMTest

  def self.included(base)

    base.state_machine :state, initial: :ready do

      event :run

    end

  end

end

You *may* need to use base.send(:state_machine, :state, initial: :ready) if the #state_machine method is private / protected.

Hope that helps!

François

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[Rob Ui]

Hi François,
using class_eval did the trick. Here's the fixed sample code:

module SMtest
  def self.included(base)
    base.class_eval do

      state_machine do
        state :sample
      end
    end

  end
end

Thanks for your time,
Rob