Скачать или смотреть How to Fix MySQL Connection Error 1045 in Your Node.js Express Application

Learn how to resolve the MySQL connection error 1045 in your Node.js Express application and successfully connect to your database.
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This video is based on the question https://stackoverflow.com/q/72183806/ asked by the user 'viru jamwal' ( https://stackoverflow.com/u/18743207/ ) and on the answer https://stackoverflow.com/a/72184152/ provided by the user 'yossi katz' ( https://stackoverflow.com/u/16214063/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting MySQL Connection Error 1045 in Node.js

If you’re trying to connect a MySQL database with your Node.js Express application, you might encounter an annoying error: Access denied for user 'user1'@ 'localhost' (using password: NO). This error, known by its code 1045, often arises due to a simple but common oversight in your code.

In this guide, we’ll break down the issue into understandable sections and provide you with a clear solution to get your application up and running smoothly.

Understanding the Problem

You may have implemented the following code:

db.js File Structure

[[See Video to Reveal this Text or Code Snippet]]

Possible Configuration in db.config.js

[[See Video to Reveal this Text or Code Snippet]]

Server.js Initialization

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When running your Node.js application with the command node server.js, you encounter the error message indicating that access is denied for the specified MySQL user.

Identifying the Root Cause

The primary reason for this error stems from an error in the property name for the password in your database connection configuration. In your db.js file, you incorrectly wrote Password (with an upper-case ‘P’), instead of the correct password (lower-case ‘p’).

The Solution

Here’s how to fix the issue:

Step 1: Update Your db.js Configuration

You need to correct the property name in your db.js file as shown below:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Test the Connection

After making this change, save your db.js file and restart your Node.js application using the command:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Check for Successful Connection

If everything is configured properly, you should see:

[[See Video to Reveal this Text or Code Snippet]]

in your console output indicating a successful connection to your MySQL database.

Conclusion

Errors like 1045 Access denied can be frustrating, but most of the time, they're fixable with a simple oversight correction. In this case, adjusting the property name from Password to password resolved the issue and allowed secure access to your MySQL database.

By following the steps above, you should be well on your way to successfully integrating MySQL with your Node.js Express application. If you encounter further issues, double-check your database user permissions and ensure that you're using the correct credentials.

Now, get back to coding, and happy developing!