Form deactivation inside validate function

Rasa Open Source
14

@ tonysinghmss Thanks for your reply, But as I told to Julian, I want to deactivate my form without defining a deactivate_intent. I want to handle the context switch. For example, a user is in the middle of a restaurant form. Bot ask him about something to find the value of REQUESTED_SLOT(for example cuisine) but the user reply like this:

‘Can you get me a taxi, please?’

User changes the topic. I want to deactivate restaurant form, then switch to taxi form and start to ask him about the location.

I can’t handle it using unhappy stories I have at least 50 other intents. So writing tons of stories is impossible for me!

I solved my problem by changing a couple of lines of 4 files of rasa and rasa_sdk libraries. But I don’t like to change libraries!

@ gaurangubhatt As Julian and Manishankar mentioned:

  1. Define your deactivation_intent
  2. Define your custom form
  3. Inside validate function of your form, check the intent of last message and deactivate your form if the intent of last message was deactivate_intent:
    def validate(
        self,
        dispatcher: "CollectingDispatcher",
        tracker: "Tracker",
        domain: Dict[Text, Any],
    ) -> List[EventType]:
        """Extract and validate value of requested slot.

        If nothing was extracted reject execution of the form action.
        Subclass this method to add custom validation and rejection logic
        """

        # extract other slots that were not requested
        # but set by corresponding entity or trigger intent mapping
        slot_values = self.extract_other_slots(dispatcher, tracker, domain)

        # extract requested slot
        slot_to_fill = tracker.get_slot(REQUESTED_SLOT)
        if slot_to_fill:
            slot_values.update(self.extract_requested_slot(dispatcher, tracker, domain))

            if not slot_values:
                if tracker.latest_message.get("intent", {}).get("name")=='deactivation':
                       self.deactivate()
                # reject to execute the form action
                # if some slot was requested but nothing was extracted
                # it will allow other policies to predict another action
                raise ActionExecutionRejection(
                    self.name(),
                    "Failed to extract slot {0} "
                    "with action {1}"
                    "".format(slot_to_fill, self.name()),
                )
        logger.debug("Validating extracted slots: {}".format(slot_values))
        return self.validate_slots(slot_values, dispatcher, tracker, domain)
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