How to create infinite loop in story? (or solve my problem in different way)

Rasa Open Source
1

Hi, I’m creating registration form after which user is asked if data is correct. My question is: how to handle situation like this

[chatbot]: is Michael your first name?
[user]: no
[chatbot]: provide it once again
[user]: Michael
[chatbot]: is Michael your first name?
[user]: no
[chatbot]: provide it once again
[user]: Michael
...
and so on

Right now my register story looks like this:

...
  - register_form
  - form{"name": "register_form"}
  - form{"name": null}
  - utter_ask_if_data_ok
* deny
  - utter_which_slot_is_wrong
* wrong_first_name
  - action_first_name_wrong     // reset first_name slot
  - register_form
  - form{"name": "register_form"}
  - form{"name": null}
  - utter_ask_if_data_ok
* affirm
...

So what if the user wats to change the name 10 times? Do I have to create 10 stories?

2

I did it with checkpoints like this:

## register path
* register_request
  - utter_start_register_form
  - register_form
  - form{"name": "register_form"}
  - form{"name": null}
  - utter_ask_if_data_ok
> are_slots_ok  

## affirm and register
> are_slots_ok
* affirm
  - utter_register_successful 
  - utter_can_i_do_anything_more
  - action_chat_restart

## deny
> are_slots_ok
* deny
  - utter_which_slot_is_wrong
* wrong_first_name
  - action_first_name_wrong
  - register_form
  - form{"name": "register_form"}
  - form{"name": null}
  - utter_ask_if_data_ok
> are_slots_ok

But is it the correct approach? I once read that “abusing chechpoints” is bad practice. Is there more “correct” way of creating loops?

3

We had a very similar case. You could try to do everything within the form using an extra slot called first_name_confirmed which will be asked before first_name if first_name is already set. Your utter_ask_first_name_confirmed would basically ask is {first_name} your first name?

I adapted our own code to your case, I think that should work like this in your form action. Didn’t test that code but it should be working with some adaptation:

def slot_mappings(self):
    return {
        "first_name_confirmed": [
            self.from_intent(intent="affirm", value=True),
            self.from_intent(intent="deny", value=False),
        ],
        "first_name": [
            self.from_entity(entity="PERSON"),
            self.from_text(),
        ],
    }

@staticmethod
def required_slots(tracker):
    if tracker.get_slot("first_name") is not None:
        return ["first_name_confirmed", "first_name"]
    else:
        return ["first_name"]

def validate_first_name_confirmed(self, value, dispatcher, tracker, domain):
    if value is False:
        # reset the first_name if it's not confirmed
        return {
            "first_name_confirmed": False,
            "first_name": None 
        }
    else:
        return {"user_full_name_confirmed": True}

def validate_first_name(self, value, dispatcher, tracker, domain):
        return {
            "first_name_confirmed": True, # confirm whenever we ask them
            "first_name": value
        }

Hope that helps Nicolas