DOC: Missing Initialization of pineconeIndex in PineconeStore in the URL

[codeapexdev]

URL

https://js.langchain.com/docs/tutorials/rag/

Checklist

• I added a very descriptive title to this issue.
• I included a link to the documentation page I am referring to (if applicable).

Issue with current documentation:

The provided example code in the LangChain documentation for using PineconeStore is incomplete as it does not initialize or create the pineconeIndex variable.

import { PineconeStore } from "@langchain/pinecone";
import { Pinecone as PineconeClient } from "@pinecone-database/pinecone";

const pinecone = new PineconeClient();
const vectorStore = new PineconeStore(embeddings, {
  pineconeIndex,
  maxConcurrency: 5,
});

The variable pineconeIndex is used without being initialized or created. This will result in an error when running the code.

Idea or request for content:

The code can be fixed by adding the initialization of pineconeIndex using the pinecone.Index()

import { PineconeStore } from "@langchain/pinecone";
import { Pinecone as PineconeClient } from "@pinecone-database/pinecone";

const PINECONE_API_KEY:any = process.env.PINECONE_API_KEY
const pinecone = new PineconeClient({
apiKey: PINECONE_API_KEY
});
const pineconeIndex = pinecone.Index("rag"); // Initialize the Pinecone index
const vectorStore = new PineconeStore(embeddings, {
pineconeIndex,
maxConcurrency: 5,
});

Also added the API key since it was not mentioned in the docs either.