TypeError: Cannot read properties of undefined (reading 'startsWith')

Working with Data Connectors & Integrations
1

I have this code here:

import { MongoClient } from "mongodb";

const createConnection = () => {

  // let current = null;

  const client = new MongoClient(process.env.MONGODB_URI);

  return async function run() {

    await client.connect();

  };

};

export const managerdb = createConnection();

but it is giving me this error here:

TypeError: Cannot read properties of undefined (reading 'startsWith')

What do you think it could be wrong?

I am using this code for Nextjs

2

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3

I am node a node.js guy, but perhaps MONGODB_URI is not defined

4

The name startsWith looks like a field from a $graphLookup stage.

I suspect that you have some logic error in the code that generates a dynamic $graphLookup with a null object.

I have doubts that the issue is in the connect code you shared.

5

The URI is good… tested and got connection OK from another file app code.

This error is trigger from a page requesting the connection from the utils page…

mport { managerdb } from "../utils/connect";

export const getStaticProps = async () => {

  const { db } = await managerdb.connect();

  const data = await db

    .collection("parts")

    .find({})

    .sort({})

    .limit(1000)

    .toArray();

  return {

    props: {

      data: JSON.parse(JSON.stringify(data)), // why?

    },

    revalidate: 60,

  };

};
6

The more I think about that issue the less confident I feel about my $graphLookup thing. If there was an issue with it, I suspect you would get a server error rather than a type error.

Despite

It would be helpful to see that URI since some application do not use exactly the same format.

7

A post was split to a new topic: Cannot read properties of undefined (reading ‘type’)

8 
Error: Cannot read properties of undefined (reading 'connection')
[nodemon] app crashed - waiting for file changes before starting...

const mongoose = require("mongoose");
const connectDB = async () => {
  const conn = await mongoose
    .connect(process.env.MONGO_URI, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    })
    .catch((err) => {
      console.log("error: ", err);
    });

  console.log(`Mongoose Connected: ${conn.connection.host}`.cyan.underline.bold);
};

module.exports = connectDB;
9

Hello, But how to do it in nodejs