Best approach to handle Fallback at any stage and trigger an action

Rasa Open Source
1

What is the best approach to handle Fallback at any stage and trigger an action. Two-stage Fallback Policy seems like an over kill when all I want to do is trigger an utter and ask for using to fill a contact form.

I have seen a lot of examples but nothing with such scenario. Maybe I missed it. It would be great if someone can answer or point me to the right resource.

2

How about using the simple Fallback Policy?. Here you can define your custom action/utter which will be triggered on Fallback.

3

Thanks that’s what I am using. But this won’t work as intended

class ActionDefaultFallback(Action):
def name(self) -> Text:
    return "action_default_fallback"

def run(self, dispatcher, tracker, domain):
    logger = logging.getLogger(__name__)
    dispatcher.utter_message(template="utter_default")

    if tracker.active_form.get("email_id") is not None:
 
        dispatcher.utter_message(template="utter_additional_question_response")
    else:
        dispatcher.utter_message(template="utter_test")

    return [AllSlotsReset(),UserUtteranceReverted()]
4

If this can help someone in near future. solution. Not perfect though.

class ActionUtterNext(Action):
def name(self) -> Text:
    return "action_utter_next"
def run(self, dispatcher: CollectingDispatcher,
        tracker: Tracker,
        domain: Dict[Text, Any]) -> List[Dict[Text, Any]]:

    emails = tracker.get_slot("email_id")
    dispatcher.utter_message("Thank you ! You will soon receive an email from us at {}".format(emails))

    return [AllSlotsReset(),UserUtteranceReverted()]

class ActionDefaultFallback(Action): def name(self) -> Text: return “action_default_fallback”

def run(self, dispatcher, tracker, domain):
    logger = logging.getLogger(__name__)

    emails = tracker.get_slot("email_id")
    print(emails)
    if emails is not None:
        # dispatcher.utter_message(template="utter_additional_question_response")
        return [FollowupAction("action_utter_next")]
    else:
        dispatcher.utter_message(template="utter_default")
    return []