ActionQueryKnowledgeBase does not return anything

Rasa Open Source
1

I am building a chatbot that deals with pokemon.

The Setup

I have a knowledge_base.json file that looks like this;

{"pokemon": [
  {"name": "bulbasaur", "id": 001, "pokedex": "Bulbasaur can be seen...."}, 
  {"name": "ivysaur", "id": 1, "pokedex": "There is a bud on this Pokemon's back ..."},
  ...
]}

And I would like to try the knowledge base feature. It seems like a great use-case. The only issue … the bot is just not responding anything when I use that action.

This is my action file.

import json
from pathlib import Path
from rasa_sdk.knowledge_base.storage import InMemoryKnowledgeBase
from rasa_sdk.knowledge_base.actions import ActionQueryKnowledgeBase

class PokemonKnowledgeBaseAction(ActionQueryKnowledgeBase):
    def __init__(self):
        knowledge_base = InMemoryKnowledgeBase("data/knowledge_base.json")
        super().__init__(knowledge_base)

And here is part of my domain;

actions:
- utter_goodbye
- utter_greet
- utter_joke
- action_query_knowledge_base
entities:
- object_type
- attribute
slots:
  object_type:
    type: unfeaturized
  mention:
    type: unfeaturized
  attribute:
    type: unfeaturized
intents:
- greet
- joke
- goodbye
- retreive_pokedex
responses:
  utter_ask_rephrase:
  - text: "Sorry, I'm not sure I understand. Could you rephrase it?"
  - text: "Could you please rephrase your message? I didn't quite get that."
session_config:
  carry_over_slots_to_new_session: true
  session_expiration_time: 60

I also have a small bit of training data, again a relevant subset:

## intent:retreive_pokedex
- give me [info](attribute:pokedex) on [charmander](object_type:pokemon)
- [pokedex](attribute:pokedex) [bulbasaur](object_type:pokemon)
- give me [info](attribute) about [ivysaur](object_type:pokemon)

The Failure

I now run this in via rasa interactive. It first trains and then I can talk to it. Here’s a chat history.

Chat History

 #    Bot                                                                                                                                                      You        
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 1    action_listen                                                                                                                                                       
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 2                                                                                                                                                                     yo 
                                                                                                                                                       intent: greet 0.97 
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 3    utter_greet 1.00                                                                                                                                                    
      Hi! I am pokebot. I am a bot that will help you catch them all! Right now I am only talk a little bit about pokemon names.                                          
      utter_ask_features 1.00                                                                                                                                             
      My features are being built as we speak. Is there anything you'd like me to be able to do in the future?                                                            
      action_listen                                                                                                                                                       
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 4                                                                                                                                                                give me 
                                                                                                                                      [information](attribute:pokedex) on 
                                                                                                                                        [charmander](object_type:pokemon) 
                                                                                                                                            intent: retreive_pokedex 1.00 
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 5    slot{"attribute": "pokedex"}                                                                                                                                        
      slot{"object_type": "pokemon"}                                                                                                                                      
      action_listen 0.53                                                                                                                                                  
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 6                                                                                                                                     gimme [info](attribute:pokedex) on 
                                                                                                                                         [bulbasaur](object_type:pokemon) 
                                                                                                                                            intent: retreive_pokedex 0.98 
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 7    slot{"attribute": "pokedex"}                                                                                                                                        
      slot{"object_type": "pokemon"}                                                                                                                                      


Current slots: 
        attribute: pokedex, knowledge_base_last_object: None, knowledge_base_last_object_type: None, knowledge_base_listed_objects: None, mention: None, object_type: pokemon

------
? The bot wants to run 'action_listen', correct?  (Y/n)

My issue is, how can I give the user the pokedex entry? It seems like all that’s happening here is that the knowledge base is filling in slots. Is this accurate?

2

See this part of the doc.

I think you need to change your NLU training dataset to something like this:

## intent:retreive_pokedex
- give me [info](attribute:pokedex) on [charmander](pokemon)
- [pokedex](pokedex) [bulbasaur](pokemon)
- give me [info](attribute:pokedex) about [ivysaur](pokemon)

The attribute key should be the same as in the knowledge base hence we are using synonyms. But since we need to get info about a particular object (say bulbasaur) which is of the object type pokemon, we need training data to recognize bulbasaur as a pokemon. Objects in knowledge base are represented by their name attribute by default. See get_representation_function_of_object() method from the doc.

You also need to add pokemon as entity and slot in the domain.

See this example for more details.

Hope that helps.