The Mysterious Case of the Missing Oracle: Debugging the “Module not found: Can’t resolve ‘oracledb'” Error in Next.js with Google Cloud PostgreSQL

Are you trying to connect your Next.js application to a Google Cloud PostgreSQL database, only to be met with the cryptic error message “Module not found: Can’t resolve ‘oracledb'”? Don’t worry, you’re not alone! In this article, we’ll delve into the mystery of the missing Oracle and guide you through the steps to resolve this frustrating issue.

The Plot Thickens: Understanding the Error Message

Before we dive into the solution, let’s take a closer look at the error message. “Module not found: Can’t resolve ‘oracledb'” suggests that Next.js is trying to import the `oracledb` module, which is used for connecting to Oracle databases. But wait, you’re not using Oracle at all! You’re trying to connect to a PostgreSQL database, which uses a different set of drivers and libraries.

The Culprit: A Misleading Dependency

The root cause of this issue lies in a misleading dependency in the `pg` module, which is used to connect to PostgreSQL databases. The `pg` module relies on the `oracledb` module as a peer dependency, which is why Next.js is trying to import it. This is a known issue in the `pg` module, and it’s been reported on the official GitHub repository.

Solving the Mystery: Step-by-Step Instructions

Now that we’ve identified the culprit, let’s walk through the steps to resolve the “Module not found: Can’t resolve ‘oracledb'” error:

1. Verify Your Dependencies

   First, make sure you have the correct dependencies installed in your `package.json` file. You should have `pg` and `next` installed as dependencies. Run the following command to verify:

   npm ls pg next

   If you don’t see `pg` or `next` in the list, install them using the following command:

   npm install pg next

2. Update the pg Module

   Update the `pg` module to the latest version using the following command:

   npm install pg@latest

3. Install the pg-native Module

   Install the `pg-native` module, which is a native implementation of the PostgreSQL driver:

   npm install pg-native

4. Configure Next.js to Use pg-native

   Create a new file called `next.config.js` in the root of your project with the following content:

   
         module.exports = {
          webpack: (config) => {
             config.module.rules.push({
               test: /\.node$/,
               use: 'node-loader',
             });
             return config;
           },
         };
       

   This configuration tells Next.js to use the `node-loader` for loading native modules, including `pg-native`.

5. Update Your Database Connection Code

   Update your database connection code to use the `pg-native` module:

   
         const { Pool } = require('pg-native');
   
         const pool = new Pool({
           user: 'your_username',
           host: 'your_host',
           database: 'your_database',
           password: 'your_password',
           port: 5432,
         });
   
         pool.query('SELECT * FROM your_table', (err, result) => {
           if (err) {
             console.error(err);
             return;
           }
           console.log(result.rows);
         });
       

   Make sure to replace the placeholders with your actual database credentials and table name.

Troubleshooting Common Issues

If you’re still encountering issues after following the steps above, here are some common issues to troubleshoot:

• Module not found: Can’t resolve ‘pg-native’

  If you’re still seeing the “Module not found: Can’t resolve ‘pg-native'” error, make sure you’ve installed `pg-native` correctly and that it’s listed in your `package.json` file.

• Error: Cannot find module ‘node-loader’

  If you’re seeing an error message about `node-loader` not being found, make sure you’ve installed `node-loader` correctly and that it’s listed in your `package.json` file.

• Connection Timeout or Refused

  If you’re experiencing connection timeouts or refused connections, make sure your database credentials are correct and that your PostgreSQL instance is running.

Conclusion: Slaying the Oracle Beast

With these steps, you should be able to connect your Next.js application to your Google Cloud PostgreSQL database without encountering the “Module not found: Can’t resolve ‘oracledb'” error. Remember to update your dependencies, install `pg-native`, and configure Next.js to use the native implementation of the PostgreSQL driver.

By following this guide, you’ll be able to slay the Oracle beast and connect your Next.js application to your PostgreSQL database with ease. Happy coding!

Dependency	Version
pg	latest
pg-native	latest
next	latest
node-loader	latest

Note: Make sure to check the latest versions of the dependencies and update them accordingly.

Frequently Asked Question

Are you facing issues with Next.js connecting to Google Cloud PostgreSQL and encountering the frustrating error “Module not found: Can’t resolve ‘oracledb'” even though you’re not using Oracle at all? Worry no more! We’ve got you covered with these frequently asked questions and answers.