[HELP] ActionExecutionRejection doesn't re-prompt for missing slots

Rasa Open Source
1

I am trying to implement a FormAction here, and I’ve overridden validate method.

Here is the code for the same:

def validate(self, dispatcher, tracker, domain):
      logger.info("Validate of single entity called")
      document_number = tracker.get_slot("document_number")
      # Run regex on latest_message
      extracted = re.findall(regexp, tracker.latest_message['text'])
      document_array = []
      for e in extracted:
          document_array.append(e[0])
      # generate set for needed things and
      document_set = set(document_array)
      document_array = list(document_set)
      logger.info(document_set)
      if len(document_set) > 0:
          if document_number and len(document_number):
              document_array = list(set(document_array + document_number))
          return [SlotSet("document_number", document_array)]
      else:
          if document_number and len(document_number):
              document_array = list(set(document_array + document_number))
              return [SlotSet("document_number", document_array)]
          else:
              # Here it doesn't have previously set slot or didn't find in current one as well.
              raise ActionExecutionRejection(self.name(), 
                                              "Please provide document number")

So, ideally as per the docs, when ActionExecutionRejection occurs, it should utter a template with name utter_ask_{slotname} but it doesn’t trigger that action.

Here is my domain.yml templates

templates:
  utter_greet:
    - text: "Hi, hope you are having a good day! How can I help?"
  utter_ask_document_number:
    - text: "Please provide document number"
  utter_help:
    - text: "To find the document, please say the ID of a single document or multiple documents"
  utter_goodbye:
    - text: "Talk to you later!"
  utter_thanks:
    - text: "My pleasure."
2

Hey @dkbhadeshiya. What do you get instead? Do you get an error or does your assistant simply skips the validation?