States.

states.rb

  state_machine :state, initial: :concept do
    state :concept
    state :incomplete
    state :complete
    state :dismissed

    event :cancel do
      transition [:concept, :incomplete, :complete] => :dismissed
    end
  end

  state_machine :export_state, initial: :unexportable do
    state :unexportable
    state :blocked
    state :exportable
    state :exported

    after_transition on: :unblock, do: :check_exportability

    event :block do
      transition [:unexportable, :exportable] => :blocked
    end

    event :unblock do
      transition [:blocked] => :unexportable
    end
  end

  state_machine :payment_state, initial: :unpaid do
    state :unpaid
    state :paid
  end