Represents a state that matches all known states in a machine.

Examples

  class Vehicle
    state_machine do
      before_transition any => :parked, :do => lambda {...}
      before_transition all - :parked => all - :idling, :do => lambda {}

      event :park
        transition all => :parked
      end

      event :crash
        transition all - :parked => :stalled
      end
    end
  end

In the above example, all will match the following states since they are known:

• parked
• stalled
• idling

Alias for all

Represents a state that matches the original from state. This is useful for defining transitions which are loopbacks.

Examples

  class Vehicle
    state_machine do
      event :ignite
        transition [:idling, :first_gear] => same
      end
    end
  end

In the above example, same will match whichever the from state is. In the case of the ignite event, it is essential the same as the following:

  transition :parked => :parked, :first_gear => :first_gear