Django gives Bad Request (400) when DEBUG = False

Cover Image for Django gives Bad Request (400) when DEBUG = False
Matheus Mello
Matheus Mello
published a few days ago. updated a few hours ago

🐍 Django Gives Bad Request (400) When DEBUG = False 🐍

So you're working with Django, and you've encountered the dreaded error message: "Bad Request (400)" when you set DEBUG to False in your settings file. Don't panic! This issue has a simple solution, and I'm here to guide you through it. Let's dive in! 💪

Understanding the Issue

The reason you're getting the "Bad Request (400)" error is that Django requires you to set the ALLOWED_HOSTS variable in your settings file when DEBUG is set to False. This security measure ensures that your Django application only responds to requests from authorized sources.

Easy Solution

To fix this issue, follow these steps:

  1. Open your Django project's settings file (usually named settings.py).

  2. Locate the ALLOWED_HOSTS variable, which is a Python list.

  3. Add the appropriate host or domain to the list. For example, if you're running your Django application locally, you can add ["localhost", "127.0.0.1"]. Ensure that the host or domain is enclosed in quotes and separated by commas.

  4. Save the settings file.

That's it! 🎉 By adding the necessary host or domain to the ALLOWED_HOSTS list, you're telling Django that requests from these sources are allowed, even when DEBUG is set to False.

Run Django Without Debug Mode

If you're wondering whether it's possible to run Django without debug mode, the answer is yes! In fact, it's best practice to set DEBUG to False when deploying your Django application to a production environment. Setting DEBUG to True in a production environment can lead to potential security vulnerabilities.

However, keep in mind that when DEBUG is set to False, Django won't show detailed error pages when an exception occurs. Instead, you'll see a generic "Bad Request (400)" message. To effectively debug your application in production, make sure you have appropriate logging and error handling mechanisms in place.

Engage With the Community!

I hope this guide helped you resolve the "Bad Request (400)" error when running Django with DEBUG set to False. Remember, the Django community is incredibly supportive and always ready to help. If you have any further questions or need clarification, feel free to reach out! Let's keep the conversation going and help each other grow.

Share your Django experiences in the comments below. Have you encountered any other common issues? How did you overcome them? Let's connect and share our knowledge! 🤓💬

Happy coding! 🚀👩‍💻👨‍💻


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