Monday, May 25

How to integrate Dynamic links in Rasa chatbot

In this era where technology is advancing every second where lagging behind means your life stuck at this stage. So being static is like being a stone that doesn’t move itself.

To be the part of this era and to be the one to be known and to be successful, you have to be dynamic so as our inventions too. For this specific reason you are here to learn how to be dynamic and to do dynamic inventions.

In this post, you will learn all about the actions in Rasa and also how to use the actions file with Rasa chat bot. Also you will learn how to modify it in the domain and the stories file to make it work and how to add the dynamic links to the Rasa chat bot so as to update it in real time unlike the static links.

To watch this full tutorial and it’s working in action the do check out this session to know more.


Dynamic Links are links that work the way you want, on multiple platforms, and whether or not your app is already installed. With Dynamic Links, your users get the best available experience for the platform they open your link on.

In this post you will understand how to update the rasa chatbot files to get this task done. For this task we have to add the file and also to start the actions server to get this part done.

Now what is actions in rasa and how to use it here?

Actions are the things your bot runs in response to user input. There are four kinds of actions in Rasa:

  • Utterance actions: start with utter_ and send a specific message to the user
  • Retrieval actions: start with respond_ and send a message selected by a retrieval model
  • Custom actions: run arbitrary code and send any number of messages (or none).
  • Default actions: e.g. action_listen, action_restart, action_default_fallback


In the previous posts we may have seen how to use the actions in respost to the user’s input for example: utter_greet. So this was one of the action that we have set for the bot to reply in response to the user’s input. Similarly there are other actions as well that we will see in today’s post as well as in the upcoming posts. In this post we will learn how to use the custom actions for the bot’s response. Example for the custom actions is actions_hello_world.

Now to create a custom action we have to add the custom python script and also to update the stories as per the actions created in the fil. Domain file will also be updated to add the dynamic link to make th change in the bot’s response in real time.

Firstly, we will update the file that was created during the initializatioon of the project. For the first time when you will see your file you will notice that all the lines has been commented and there is nothing that will work. So too make it work we will update the file and for now add the following lines of code in the file:

from typing import Any, Text, Dict, List
from rasa_sdk import Action, Tracker
from rasa_sdk.executor import CollectingDispatcher
class ActionHelloWorld(Action):
    def name(self) -> Text:
        return "action_dynamic_link"
    def run(self, dispatcher: CollectingDispatcher,
            tracker: Tracker,
            domain: Dict[Text, Any]) -> List[Dict[Text, Any]]:
        # dispatcher.utter_message(text="Hello World!")
        print("Link: ",tracker.get_slot('LINK'))
        return []

and along with this you have to update the endpoints.yml file to make this action file sun and also to start the action server. In the endpointys.yml file uncomment the following lines and save the file:

  url: "http://localhost:5055/webhook"

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Now when you have created the actions in the file now update the domain.yml file as per the actions created. Add the following lines in the actions block in the domain.yml file:

-  action_dynamic_link

Also, you have to update the utter_ template where you want to add the dymanic link that will make changes in real time

	- text: Here is the link to our 	website {link}

When the domain file is upodated it’s time to update the stories as per the actions specified and updated. As per our conversation between the bot we have to make changes in the file in such a way:

## happy info path
* more_info
  - action_dynamic_link

As this story was a seperate part of the complete conversational flow so this story weas created seperately without conflicting the other stories.

In this way we have updated the complete the rasa chatbot. Now it’s time to train the model and to check its working in real time.

$ rasa train

$ rasa x

The output for the above changes will look something like this:

So this was it for this post I hope every this was very clear to you but still if you are having any doubts or queries related to the topic, feel free to leave a comment below in the comment section. Also do comment your valuable feedback in the comment section so as to appreciate/improve ourselves. For any further information or queries you can also WhatsApp me at +91 8209829808.

Till then stay tuned and happy learning 🤗

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