Class CloudflareD1MessageHistory

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

Example

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

  • BaseListChatMessageHistory
    • CloudflareD1MessageHistory

Constructors

constructor

Properties

database

Methods

addMessage clear getMessages

Constructors

constructor

Properties

database

database: D1Database

Methods

addMessage

  • addMessage(message): Promise<void>

  • 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.

clear

getMessages

  • getMessages(): Promise<BaseMessage[]>

  • 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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