Need help to build a conditional logic scenario

Rasa Open Source
1

Hi, I’m looking to build the following story but i have yet to find any useful reference from the forum. Any advise or ideas are much appreciated.

  • I have a bot that will require user to provide slot A and slot B.
  • I allow user to stop and detour at any point of time when answering slot A and slot B. (Thus, user will be redirect back to main menu, in my case)
  • Anytime when the user visit back the bot, I want to first check whether the user filled up both slot A and B.
  • If either one of the slot is not filled, i will continue to ask the user to provide the information.
  • If both slot is fill, I will then ask them whether they want to edit it

What i have tried :

  1. Created a FormAction and set the requested_slot to be A and B
  2. Created a custom Action and do a checking with tracket.get_slot("A") and tracker.get_slot("B"). If either one of A & B is a None value, set a FollowupAction(‘FormAction’)

Problem that i am facing:

  1. The flow will always stuck at the custom Action part, even if i’m still missing out any of the slot to fill.

I’m also trying to figure out is there a way this can be done with just utilizing FormAction? (eg: if requested_slot is A, continue the Form; if requested_slot is None, lead to a custom Action that user can edit the slot values)

Anyone, please enlighten me =)

Regards

2

I can help you, if you provide code details…

3

Not sure what you mean when you say “stuck at the custom action part”. Can you explain more?

4

Hi, so this is something that i ran into:

  • For any new visit, the custom action will trigger first (check whether slot A and B are None, if yes FollowupAction with the FormAction).
  • For some reason, i was unable to proceed to the FormAction. Rasa wil always lead me to the utter_ask_for_modify output i set for when both slot A and B are filled. This is still the case after i ran /restart and reset all slots.

Custom Action

def run(self, dispatcher, tracker: Tracker, domain: Dict[Text, Any]
) -> List[Dict[Text, Any]]:
    if tracker.get_slot('slot_a') != 'None' and tracker.get_slot('slot_b') != 'None':
      print("slot_a: ", tracker.get_slot('slot_a'))
      print("slot_b: ", tracker.get_slot('slot_b')
      dispatcher.utter_message(template = 'utter_ask_for_modify')
      return []
    if tracker.get_slot('slot_a') or tracker.get_slot('slot_b') == 'None':
      print("slot_a: ", tracker.get_slot('slot_a'))
      print("slot_b: ", tracker.get_slot('slot_b'))
      return[FollowupAction('form_action')]

Looking for some pointers on this matter.

Thanks

5

Shouldn’t 'None' be None (without apostrophes)? You’re checking against the string None instead of a python null value, and it will always trigger utter_ask_for_modify.

Edit: Also… you shouldn’t use != and == with None… Use is and is not, so it would be like this:

if tracker.get_slot('slot_a') is not None and tracker.get_slot('slot_b') is not None:
6

Good catch and thanks for the advice, tried this and it worked.