I am using Next.js's MongoDB example template and it comes with a MongoDB util function:
import { MongoClient } from 'mongodb';
const uri = process.env.MONGODB_URI;
const options = {};
let client;
let clientPromise;
if (!process.env.MONGODB_URI) {
throw new Error('Please add your Mongo URI to .env.local');
}
if (process.env.NODE_ENV === 'development') {
if (!global._mongoClientPromise) {
client = new MongoClient(uri, options);
global._mongoClientPromise = client.connect();
}
clientPromise = global._mongoClientPromise;
} else {
client = new MongoClient(uri, options);
clientPromise = client.connect();
}
export default clientPromise;
Here is how I am using it and I am certain that I am using this incorrectly.
import { clientPromise } from '../../lib/mongodb';
export default async (req, res) => {
try {
const db = await clientPromise();
const users = await db.collection('users').find({}).limit(20).toArray();
res.json(users);
} catch (e) {
console.error(e);
res.json({ error: 'Not connected!' });
}
};
The error is "TypeError: (0 , lib_mongodb__WEBPACK_IMPORTED_MODULE_0_.clientPromise) is not a function"
You're exporting clientPromise, which is client.connect(). At this point you already "triggered" the connection function. now all you have to do is wait on that promise,
So instead of
const db = await clientPromise();
You should do:
const connection = await clientPromise; // this is a client connection not a db
const db = connection.db();