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

Example

const chatHistory = new PlanetScaleChatMessageHistory({
tableName: "stored_message",
sessionId: "lc-example",
config: {
url: "ADD_YOURS_HERE",
},
});
const chain = new ConversationChain({
llm: new ChatOpenAI(),
memory: chatHistory,
});
const response = await chain.invoke({
input: "What did I just say my name was?",
});
console.log({ response });

Hierarchy

  • BaseListChatMessageHistory
    • PlanetScaleChatMessageHistory

Constructors

Properties

Methods

Constructors

Properties

client: Client

Methods

  • Method to add a new message to the PlanetScale 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 retrieve all messages from the PlanetScale database for the current session.

    Returns Promise<BaseMessage[]>

    Promise that resolves to an array of BaseMessage objects.

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