state_machine.rb

#See https://github.com/pluginaweek/state_machine/issues/251
module StateMachine
  module Integrations
     module ActiveModel
       public :around_validation
     end

     module ActiveRecord
       public :around_save
     end
  end
end


module ActiveRecord
  # HACK to set state_machine initial states as default attributes with Rails 4
  module ModelSchema
    module ClassMethods
      private

      def raw_default_values
        result = columns_hash.transform_values(&:default)

        state_machines.initialize_states(nil, static: :force, dynamic: false, to: result) if respond_to?(:state_machines)

        result
      end
    end
  end

  # HACK to store state_machine initial states in DB too with Rails 4
  module AttributeMethods
    private

    def attributes_for_create(attribute_names)
      if self.class.respond_to?(:state_machines)
        state_machine_attributes = self.class.state_machines.keys.map(&:to_s)
      else
        state_machine_attributes = []
      end

      (attribute_names + state_machine_attributes).uniq.reject do |name|
        pk_attribute?(name) && id.nil?
      end
    end
  end
end