Testing custom component

Rasa Open Source
1

Hello everybody,

I am new to Rasa, and I have the following question.

I have introduced a new custom component to my code, that adds a new entity called “name” to my already existent entities.

I started writing a python code that sends a request to the server, and prints the values of my entities, but I understand that the new entity “name” that I have introduced is not recognized.

Is there any way, to get the value of the new entity ?

2

If you send the message to Rasa by API (using requests), you can read the slot values from the tracker store. I use mongodb to persist the tracker store, (see the endpoints.yml file), so I can access it directly using pymongo.

Here’s how I read the slot values:

from pymongo import MongoClient

...

mongocli = MongoClient('mongodb://mongo:27017')

#rasa db is the same as set in the endpoints.yml tracker store.
rasa = mongocli['rasa']
conversations_iago = rasa['conversations']

# tester is the user_id used to submit the messages
user_id = 'tester'

slots_found = conversations_iago.find({ 'sender_id': str(user_id) }, { 'slots': 1 } )

for row in slots_found:
        slots = dict(row['slots'])
4

Hello samscudder thank you so much for your answer, but I think I didn’t explain what I want to do very well.

So I have a list of sentences called “examples”.

What I need to do is simply print the value of the new entity “name” introduced by my custom component.

The thing is that, the new entity “name” is not recognized.

5

It looks like no entity extraction is happening… Are you hitting the right intent? Try printing out or logging the value of resp_json to see what Rasa is returning.

PS: I guess you know this, but the loop is wrong. It should be for i in range(0, len(examples)): or for example in examples: and then you’d use params = { "text": example } (example instead of examples[i]).

The way it stands, you’re throwing a 'int' object is not iterable error.

6

Yes I have used the same syntaxe for params, I edited my code in order to explain what is happening.

The code I am using extracts the other entities (the ones I have defined in the nlu file), my problem is that it doesn’t recognize the one I introduced in my custom component. I want my code to be able to identify all of the entities including the old and new one.

Maybe the problem is in the way I introduce my new entity, in my custom component I simply introduce it inside the process() method like the following:

def process(self, message: Message, **kwargs: Any) -> None:

        entities = message.get(ENTITIES)

        for entity in entities:

            if entity['entity'] == 'person':

                #here I do some calculations, because the entity person has a hidden name inside of it

                ...
                    
                entity['name']=result

So it prints out when I use the rasa shell nlu command only.

7

I think I understand a bit better what you’re trying to do. I thought that by custom component meant an action. Sorry about that.

I looked over the DIETClassifier, and noticed that it does this after extracting the entities:

message.set(ENTITIES, entities, add_to_output=True)

Do you have something like this in your code after setting entity[‘name’]?

8

I am the one who should be apologizing, I just realized that the way I introduce my entity is wrong. The whole conception of my code should be changed…