Connecting Mongoose with NextAuth.js in Next.js

This guide outlines the steps to integrate MongoDB using Mongoose and implement Google authentication with NextAuth.js in a Next.js project.

Prerequisites

• Node.js and npm installed
• MongoDB Atlas account or local MongoDB setup
• Google Cloud Console account

Setup Steps

1. Initialize Next.js Project

   • Create a new Next.js project using create-next-app

2. Install Dependencies

   • Install next-auth, mongoose, and related types

3. Environment Configuration

   • Create .env.local file
   • Add MongoDB URI, Google OAuth credentials, and NextAuth secret

4. MongoDB Connection

   • Set up a MongoDB connection utility in lib/mongodb.js

5. User Model

   • Define the User schema in models/User.js

6. NextAuth Configuration

   • Set up NextAuth API route in app/api/auth/[...nextauth]/route.js
   • Configure Google provider and callbacks

7. Authentication Implementation

   • Use NextAuth hooks in components for authentication state
   • Implement sign-in and sign-out functionality

8. Route Protection

   • Set up middleware for protecting routes

9. Run Development Server

   • Start the Next.js development server

Key Files

• lib/mongodb.js: MongoDB connection utility
• models/User.js: Mongoose User model
• app/api/auth/[...nextauth]/route.js: NextAuth configuration
• middleware.js: Route protection middleware

Environment Variables

Ensure these are set in .env.local:

• MONGODB_URI
• GOOGLE_CLIENT_ID
• GOOGLE_CLIENT_SECRET
• NEXTAUTH_SECRET
• NEXTAUTH_URL

Google OAuth Setup

1. Create a project in Google Cloud Console
2. Enable Google+ API
3. Create OAuth 2.0 credentials
4. Set authorized origins and redirect URIs

Deployment Notes

• Configure environment variables on the hosting platform
• Update OAuth settings for production URL
• Ensure database connection string is correct for production

Additional Resources

• Next.js Documentation
• NextAuth.js Documentation
• Mongoose Documentation

For detailed code implementation, refer to the project files in this repository.