state_machine in module

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Rob Ui

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Nov 2, 2012, 4:17:21 AM11/2/12
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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

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Nov 2, 2012, 9:37:49 AM11/2/12
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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

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Nov 8, 2012, 3:54:37 AM11/8/12
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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
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