Rasa 2.0 - How to deactivate a form during validation?

Rasa Open Source
2

I think I have found a way.

  1. I have defined a slot:
deactivate_form:
    type: categorical
    values:
    - flight_departure_form
    - flight_arrival_form
    #influence_conversation: true  <- this does not yet work in 2.0rc3
  1. I have created custom actions for forms asking for slots (rasa will ask for them even if a form “decativation” is requested):
class AskForSlotActionFlightInfo(Action):
    def name(self) -> Text:
        return "action_ask_sl_frm_flight_info_abstract"
    def run(
        self, dispatcher: CollectingDispatcher, tracker: Tracker, domain: Dict
    ) -> List[EventType]:
        print("  Tracker slots:", {k:v for k,v in tracker.slots.items() if v is not None})
        ## is there a deactivated form?
        deactivate = tracker.get_slot("deactivate_form")
        if deactivate:
            form = self.remove_suffix(deactivate, "_form")
            if form in self.name():
                return []
        dispatcher.utter_message(...)
        return []


class AskForSlotActionDepartureAirline(AskForSlotActionFlightInfo):
    def name(self) -> Text:
        return "action_ask_sl_frm_flight_departure_info_airline"
class AskForSlotActionDepartureCity(AskForSlotActionFlightInfo):
    def name(self) -> Text:
        return "action_ask_sl_frm_flight_departure_info_city"
class AskForSlotActionDepartureTime(AskForSlotActionFlightInfo):
    def name(self) -> Text:
        return "action_ask_sl_frm_flight_departure_info_time"
  1. And finally, I created a rule:
- rule: Deactivate form
  condition:
  - active_loop: flight_departure_form
  - slot_was_set:
    - deactivate_form: flight_departure_form
  steps:
  - action: flight_departure_form
  - active_loop: null
  #- action: utter_deactivating_form
  - action: action_reset_all_slots_flight_departure_form

It seems to work. Is there a better solution?