Скачать или смотреть How to Fix the MongoError and DeprecationWarning in MongoDB

Discover how to remove the `MongoError` and `DeprecationWarning` when using MongoDB with Mongoose in your Node.js application. Learn why it happens and how to fix it.
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This video is based on the question https://stackoverflow.com/q/66179884/ asked by the user 'Ayush' ( https://stackoverflow.com/u/12548988/ ) and on the answer https://stackoverflow.com/a/66190866/ provided by the user 'Walker' ( https://stackoverflow.com/u/12376307/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix the MongoError and DeprecationWarning in MongoDB: A Simple Guide

When you're building an API using MongoDB and Mongoose and suddenly encounter a warning while running your app.js file, it can be frustrating. In this post, we'll clarify why you're seeing this warning and, most importantly, how to resolve it.

The Problem: Understanding the Deprecation Warning

As described in the warning message, here’s what you might see:

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

This warning typically happens when using Mongoose version 5.11.16. It indicates that you are encountering a known issue with that specific version. Such warnings can be particularly annoying as they clutter your console while you are trying to debug or test your application.

The Solution: Downgrade Mongoose Version

Fortunately, there's a straightforward solution. You can downgrade your Mongoose version to avoid these warnings. Here’s how you can do it:

Steps to Downgrade Mongoose

Uninstall the Current Version:
First, you need to remove the problematic version of Mongoose. Run the following command in your terminal:

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

Install the Previous Version:
After uninstalling, install Mongoose version 5.11.15 by executing the following command:

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

Verification

Once you've completed the above steps, run your app.js file again to verify that the deprecation warnings are gone. If everything was successful, your console should be free from any related warnings, allowing you to focus on the development of your API.

Conclusion

Warnings in your console can be more than just an annoyance; they often signal underlying issues or changes that need to be addressed in your code. By downgrading Mongoose to a stable version, you can keep your application running smoothly without unnecessary disruptions.

If you encounter any further issues or have questions about MongoDB or Mongoose, feel free to reach out or leave a comment.

Happy coding!