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

Example

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(),
memory: new BufferMemory({ chatHistory }),
});

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

Hierarchy

  • BaseListChatMessageHistory
    • FirestoreChatMessageHistory

Constructors

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 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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