Скачать или смотреть Resolving the missing 1 required positional argument: 'get_response' Error in Django Middleware

Discover how to fix the common Django Middleware error: `missing 1 required positional argument: 'get_response'` when implementing JWT Authentication.
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This video is based on the question https://stackoverflow.com/q/77293178/ asked by the user 'Abdulaziz Ibrahim' ( https://stackoverflow.com/u/20471683/ ) and on the answer https://stackoverflow.com/a/77293517/ provided by the user 'willeM_ Van Onsem' ( https://stackoverflow.com/u/67579/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding and Fixing the get_response Error in Django Middleware

As a Django developer, you may encounter various challenges, especially when implementing new features like JWT authentication. A common error during this process is the missing 1 required positional argument: 'get_response' error in your custom middleware. This guide will walk you through the problem and provide a clear solution to help you implement JWT authentication without hassle.

The Problem: Understanding the Error

When creating middleware in Django, it is crucial to implement it correctly. This specific error usually occurs because you are using an outdated style of middleware. Let’s examine a snippet of the error log to better understand the problem:

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

This error indicates that the get_response parameter in your middleware’s _init_ method is not being passed correctly, leading to a malfunction in your middleware's operation.

The Cause: Misuse of MiddlewareMixin

In the code provided, the TokenMiddleware class inherits from MiddlewareMixin, which is part of the old-style middleware pattern in Django. In Django 1.10 and later, a new style of middleware is recommended, which doesn't require using MiddlewareMixin.

Here’s a simplified explanation of what went wrong:

Using MiddlewareMixin: You are using an old way of defining middleware classes.

Incorrect Registration: The middleware is incorrectly integrated into the Django Rest Framework authentication settings.

The Solution: Update Your Middleware Implementation

Step 1: Modify Your Middleware Class

First, remove MiddlewareMixin from the TokenMiddleware class definition. Below is the corrected version of your code:

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

Step 2: Update Your Django Settings

Next, modify your Django settings. Remove the TokenMiddleware from the DEFAULT_AUTHENTICATION_CLASSES in your REST framework configuration, as shown below:

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

Step 3: Register Your Middleware

Finally, ensure your middleware is registered properly in the MIDDLEWARE list in your settings.py:

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

Conclusion

By updating your middleware to comply with the latest Django standards, you can eliminate the missing 1 required positional argument: 'get_response' error and implement JWT authentication effectively. If you continue to face issues, refer to the Django documentation or community forums for more assistance.

With these changes, you should be on your way to having a functional JWT authentication setup in your Django application. Happy coding!