Building custom actions using Rasa SDK

Custom actions provide a mechanism to run specific actions in remote servers. This is crucial for building a chatbot, as it is the gateway for implementing detailed business logic.

Installing the Rasa SDK package

Rasa integrates rasa-sdk in its package. So, when you install Rasa, it will also automatically install rasa-sdk. If we want to use rasa-sdk alone (for example, in a production environment), we can run the following command:

pip install rasa-sdk

Writing custom actions

Custom actions must inherit the Action class from the SDK, so that the server can automatically discover and register the custom actions. Here is an example:

from rasa_sdk import Action
from rasa_sdk.events import SlotSet
class ActionCheckRestaurants(Action):
   def name(self) -> Text:
      return "action_check_restaurants"
   def run(self,
         ...