@next-auth/mongodb-adapter

Official MongoDB adapter for Auth.js / NextAuth.js.

Installation

npm

npm install next-auth @next-auth/mongodb-adapter mongodb

yarn

yarn add next-auth @next-auth/mongodb-adapter mongodb

pnpm

pnpm add next-auth @next-auth/mongodb-adapter mongodb

MongoDBAdapter()

Setup

The MongoDB adapter does not handle connections automatically, so you will have to make sure that you pass the Adapter a MongoClient that is connected already. Below you can see an example how to do this.

Add the MongoDB client

// This approach is taken from https://github.com/vercel/next.js/tree/canary/examples/with-mongodb
import { MongoClient } from "mongodb";

if (!process.env.MONGODB_URI) {
  throw new Error('Invalid/Missing environment variable: "MONGODB_URI"');
}

const uri = process.env.MONGODB_URI;
const options = {};

let client;
let clientPromise: Promise<MongoClient>;

if (process.env.NODE_ENV === "development") {
  // In development mode, use a global variable so that the value
  // is preserved across module reloads caused by HMR (Hot Module Replacement).
  if (!global._mongoClientPromise) {
    client = new MongoClient(uri, options);
    global._mongoClientPromise = client.connect();
  }
  clientPromise = global._mongoClientPromise;
} else {
  // In production mode, it's best to not use a global variable.
  client = new MongoClient(uri, options);
  clientPromise = client.connect();
}

// Export a module-scoped MongoClient promise. By doing this in a
// separate module, the client can be shared across functions.
export default clientPromise;

Configure Auth.js

import NextAuth from "next-auth"
import { MongoDBAdapter } from "@next-auth/mongodb-adapter"
import clientPromise from "../../../lib/mongodb"

// For more information on each option (and a full list of options) go to
// https://authjs.dev/reference/providers/oauth
export default NextAuth({
  adapter: MongoDBAdapter(clientPromise),
  ...
})

MongoDBAdapter(client: Promise<MongoClient>, options: MongoDBAdapterOptions = {}): Adapter

Parameters

Parameter	Type
client	Promise<MongoClient>
options	MongoDBAdapterOptions

Returns

Adapter

---

MongoDBAdapterOptions

This is the interface of the MongoDB adapter options.

Properties

collections?

collections: object

The name of the MongoDB collections.

Type declaration

Member	Type
Accounts?	string
Sessions?	string
Users?	string
VerificationTokens?	string

databaseName?

databaseName: string

The name you want to give to the MongoDB database

---