Astra DB

DataStax Astra DB is a serverless AI-ready database built on Apache Cassandra® and made conveniently availablev through an easy-to-use JSON API.

This notebook goes over how to use Astra DB to store chat message history.

Setup

To run this notebook you need a running Astra DB. Get the connection secrets on your Astra dashboard:

the API Endpoint looks like https://01234567-89ab-cdef-0123-456789abcdef-us-east1.apps.astra.datastax.com;
the Database Token looks like AstraCS:aBcD0123....

!pip install "langchain-astradb>=0.6,<0.7"

Set up the database connection parameters and secrets

import getpass

ASTRA_DB_API_ENDPOINT = input("ASTRA_DB_API_ENDPOINT = ")
ASTRA_DB_APPLICATION_TOKEN = getpass.getpass("ASTRA_DB_APPLICATION_TOKEN = ")

ASTRA_DB_API_ENDPOINT =  https://01234567-89ab-cdef-0123-456789abcdef-us-east1.apps.astra.datastax.com
ASTRA_DB_APPLICATION_TOKEN =  ········

Example

from langchain_astradb import AstraDBChatMessageHistory

message_history = AstraDBChatMessageHistory(
    session_id="test-session",
    api_endpoint=ASTRA_DB_API_ENDPOINT,
    token=ASTRA_DB_APPLICATION_TOKEN,
)

message_history.add_user_message("hi!")

message_history.add_ai_message("hello, how are you?")

API Reference: AstraDBChatMessageHistory

message_history.messages

[HumanMessage(content='hi!', additional_kwargs={}, response_metadata={}),
 AIMessage(content='hello, how are you?', additional_kwargs={}, response_metadata={})]

快速开始

核心组件

进阶使用

在生产环境使用

Setup

Set up the database connection parameters and secrets

Example

​Setup

​Set up the database connection parameters and secrets

​Example

Setup

Set up the database connection parameters and secrets

Example