I want to create a conversation flow in which the user provides some input, and based on that input the bot retrieves a series of yes/no questions (e.g. from some db or api) that it asks consecutively. Once all the questions have been answered the bot then feeds the initial input that generated those questions plus the answers to those yes/no questions into a prediction model, but I don’t know how to get started. Click here for a more detailed description of my project idea. To my understanding, this dialogue requires FormAction, but I don’t know how to use list slots. I looked at: Using the affirm intent multiple times and storing the "yes" or "no" values , but the difference in my case is that the yes/no questions refer to the same group of entities. I’m thinking I need a slot that’s a list of the user’s Boolean user responses which can then be passed onto my prediction model, so: how can I fill a slot of type-list with Boolean of previous user responses?

You are right. I could think of a workaround, it requires a little bit of hacking. You can avoid writing 250 utter_slot_name by overriding request_next_slot method of the FormAction class inside your own FormAction, here is the original definition: def request_next_slot( self, dispatcher: "CollectingDispatcher", tracker: "Tracker", domain: Dict[Text, Any], ) -> Optional[List[EventType]]: """Request the next slot and utter template if needed, else return None""" for slot in self.required_slots(tracker): if self._should_request_slot(tracker, slot): logger.debug(f"Request next slot '{slot}'") dispatcher.utter_message(template=f"utter_ask_{slot}", **tracker.slots) return [SlotSet(REQUESTED_SLOT, slot)] # no more required slots to fill return None You can customize the dispatcher.utter_message method as per your requirement. You can also avoid writing 250 validation_slot_name functions by overriding the validate_slots method. Here is the original definition: async def validate_slots( self, slot_dict: Dict[Text, Any], dispatcher: "CollectingDispatcher", tracker: "Tracker", domain: Dict[Text, Any], ) -> List[EventType]: """Validate slots using helper validation functions. Call validate_{slot} function for each slot, value pair to be validated. If this function is not implemented, set the slot to the value. """ for slot, value in list(slot_dict.items()): validate_func = getattr(self, f"validate_{slot}", lambda *x: {slot: value}) if utils.is_coroutine_action(validate_func): validation_output = await validate_func( value, dispatcher, tracker, domain ) else: validation_output = validate_func(value, dispatcher, tracker, domain) if not isinstance(validation_output, dict): logger.warning( "Returning values in helper validation methods is deprecated. " + f"Your `validate_{slot}()` method should return " + "a dict of {'slot_name': value} instead." ) validation_output = {slot: validation_output} slot_dict.update(validation_output) # validation succeed, set slots to extracted values return [SlotSet(slot, value) for slot, value in slot_dict.items()] As you can see, this function calls the corresponding validate_slot_name function for a given slot. You can customize this to do the appending here itself for a given slot. I couldn’t think of a way to avoid writing 250 slots though. Hope that helps.

How can I use FormAction with a list slot?

Rasa Open Source

slcheungcasado (Sheng Leung Cheung Casado) March 5, 2020, 11:50am 14

It seems that your idea is the only way to accomplish this based on this post. (As of now)

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How can I use FormAction with a list slot?

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