langchain.js
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    Class FirestoreChatMessageHistory

    Class for managing chat message history using Google's Firestore as a storage backend. Extends the BaseListChatMessageHistory class.

    const chatHistory = new FirestoreChatMessageHistory({
      collectionName: "langchain",
      sessionId: "lc-example",
      userId: "a@example.com",
      config: { projectId: "your-project-id" },
    });

    const chain = new ConversationChain({
      llm: new ChatOpenAI({ model: "gpt-4o-mini" }),
      memory: new BufferMemory({ chatHistory }),
    });

    const response = await chain.invoke({
      input: "What did I just say my name was?",
    });
    console.log({ response });

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    lc_namespace

    Methods

    addMessage clear getMessages

    Constructors

    Properties

    lc_namespace: string[] = ...

    Methods

    • Method to add a new message to the Firestore collection. The message is passed as a BaseMessage object.

      Parameters

      • message: BaseMessage

        The message to be added as a BaseMessage object.

      Returns Promise<void>

    • Method to delete all messages from the Firestore collection associated with the current session.

      Returns Promise<void>

    • Method to retrieve all messages from the Firestore collection associated with the current session. Returns an array of BaseMessage objects.

      Returns Promise<BaseMessage[]>

      Array of stored messages

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