langchain.js
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    Class CloudflareD1MessageHistory

    Install and import from "@langchain/cloudflare" instead.

    Class for storing and retrieving chat message history from a Cloudflare D1 database. Extends the BaseListChatMessageHistory class.

    const memory = new BufferMemory({
      returnMessages: true,
      chatHistory: new CloudflareD1MessageHistory({
        tableName: "stored_message",
        sessionId: "example",
        database: env.DB,
      }),
    });

    const chainInput = { input };

    const res = await memory.chatHistory.invoke(chainInput);
    await memory.saveContext(chainInput, {
      output: res,
    });

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    database lc_namespace

    Methods

    addMessage clear getMessages

    Constructors

    Properties

    database: D1Database
    lc_namespace: string[] = ...

    Methods

    • Method to add a new message to the Cloudflare D1 database for the current session.

      Parameters

      • message: BaseMessage

        The BaseMessage object to be added to the database.

      Returns Promise<void>

      Promise that resolves to void.

    • Method to delete all messages from the Cloudflare D1 database for the current session.

      Returns Promise<void>

      Promise that resolves to void.

    • Method to retrieve all messages from the Cloudflare D1 database for the current session.

      Returns Promise<BaseMessage[]>

      Promise that resolves to an array of BaseMessage objects.

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