Can´t break Rasa form within validate function

Rasa Open Source
1

Hello,

so I recently work on some kind of accident bot. The bot asks several questions and slots get only filled by the user input. I do some background checks within the validate functions. For example connect to a database and check if the given name is present in the database. Check if street and zip is valid and so on.

The user should be able to break the form at any point he want. I created a intent stop. If the input gets classified as stop and the user afirms the question with yes the bot should say goodbye.

There are several questions regarding this feature and it seems this is not as easy as expected. I tried several approaches but nothing worked like expected. There is a form example on Rasa GitHub page. I cloned the restaurant form bot and there it workes perfectly to break the form.

I set up my project like the restaurant form bot but I cant break the form.

So here are some parts of my project:

domain.yml

intents:
- affirm
- deny
- goodbye
- greet
- start_accident_report
- stop
- who_are_you

slots:
  name:
    type: text
    influence_conversation: false
    mappings:
    - type: from_text
      conditions:
      - active_loop: accidentForm
        requested_slot: name

forms:
  accidentForm:
    required_slots:
    - name
    - <and some other slots>

responses:
  utter_greet:
  - text: "Hallo, Ich bin der Unfall Bot. Ich helfe dir einen Arbeitsunfall aufzunehmen."
  utter_goodbye:
  - text: "Auf Wiedersehen"
  - text: "Servus"
  - text: "Schönen Tag noch"
  utter_ask_accidentForm_name:
  - text: "Bitte nenne mir den Vor- und Nachnamen der verunfallten Person"
  utter_submit:
  - text: "Alles erledigt!"
  utter_slots_values:
  - text:
      "Hier ist eine Übersicht der Meldung\n:
       - Opfer: {name}
       - something else
  utter_ask_continue:
  - text: "Möchtest du wirklich beenden?"
  utter_wrong_name:
  - text: "Namen richtig eingeben!"
  
actions:
- validate_accidentForm

session_config:
  session_expiration_time: 60
  carry_over_slots_to_new_session: true

rules.yml

version: "3.1"
rules:
  - rule: Greet user
    steps:
      - intent: greet
      - action: utter_greet

  - rule: activate accident form
    steps:
      - intent: start_accident_report
      - action: accidentForm
      - active_loop: accidentForm

  - rule: submit accident form
    condition:
    - active_loop: accidentForm
    steps:
      - action: accidentForm
      - active_loop: null
      - action: utter_submit
      - action: utter_slots_values

stories.yml

version: "3.1"
stories:
  - story: stop form + continue
    steps:
      - intent: start_accident_report
      - action: accidentForm
      - active_loop: accidentForm
      - intent: stop
      - action: utter_ask_continue
      - intent: affirm
      - action: accidentForm
      - active_loop: null
      - action: utter_submit
      - action: utter_slots_values

  - story: stop form + stop
    steps:
      - intent: start_accident_report
      - action: accidentForm
      - active_loop: accidentForm
      - intent: stop
      - action: utter_ask_continue
      - intent: deny
      - action: action_deactivate_loop
      - active_loop: null

  - story: interactive_story_1
    steps:
    - intent: start_accident_report
    - action: accidentForm
    - active_loop: accidentForm
    - slot_was_set:
      - requested_slot: name
    - intent: stop
    - slot_was_set:
      - name: beenden
    - action: utter_ask_continue
    - intent: affirm
    - action: action_deactivate_loop
    - active_loop: null
    - slot_was_set:
      - requested_slot: null

Action

class ValidateAccidentForm(FormValidationAction):
    def name(self):
        return 'validate_accidentForm'

    def validate_name(
        self,
        value: Text,
        dispatcher: CollectingDispatcher,
        tracker: Tracker,
        domain: Dict[Text, Any],
    ) -> Dict[Text, Any]:

        if len(value) <= 5: # dummy check
            dispatcher.utter_message(response='utter_wrong_name')
            return {"name": None}
        return {"name": value}

As you see in my stories I tried the interactive learning to learn the bot then to exit the form. Without success. Whats wrong in my project?

Any help I highly appreciate.