Скачать или смотреть Fixing the AUTH_USER_MODEL Error in Django

Discover how to resolve the `django.core.exceptions.ImproperlyConfigured` error related to `AUTH_USER_MODEL` in Django by understanding model imports and structure.
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This video is based on the question https://stackoverflow.com/q/65446169/ asked by the user 'Kanchon Gharami' ( https://stackoverflow.com/u/13677363/ ) and on the answer https://stackoverflow.com/a/66912648/ provided by the user 'mos' ( https://stackoverflow.com/u/10901313/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Problem: The AUTH_USER_MODEL Error in Django

As you delve into creating custom user models in Django, you might encounter the frustrating error:

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

This error typically happens when Django cannot locate your custom user model, which is crucial for customizing user authentication. In this guide, we will explore why this error occurs and how to properly configure your Django project to resolve it.

The Background on Custom User Models in Django

Django allows you to create a custom user model by inheriting from AbstractUser. This is particularly useful for adding extra fields, such as is_student or is_teacher, to your user model. In this scenario, we created a custom user model named myUser within an app called app1.

Consider the following code snippet:

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In the settings.py file, we also set our custom user model as follows:

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

Even after ensuring that your custom user model is registered with the Django admin and the app is included in the INSTALLED_APPS list, you might still encounter the AUTH_USER_MODEL error when running migrations or starting the server.

Tracing the Root of the Error

The error often stems from an improper import sequence in your models.py. Specifically, it is caused by the order in which you import Django forms related to user authentication. You may have attempted to import UserCreationForm in your models.py before defining your custom user model, leading to import resolution issues.

The relevant code snippet looks like this:

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

How to Fix the AUTH_USER_MODEL Error

Step 1: Adjust the Import Sequence

Make sure to import UserCreationForm after you've defined your custom user model. Here are two potential solutions:

Move the Import:

Move the UserCreationForm import below the definition of your custom user myUser.

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

Create a Separate File:

Alternatively, you can create a new file (forms.py) specifically for forms, which will help separate your model definitions and keep your file organized.

Step 2: Refresh Your Migrations

Once you’ve corrected the import sequence, ensure that your migrations are up to date:

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

Step 3: Run the Server

After addressing the import issue and ensuring your migrations are current, try to run the server again:

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

Conclusion

By understanding the necessary steps to configure your custom user model correctly, you can avoid the AUTH_USER_MODEL error that might disrupt your Django development process. Remember, the order of operations matters greatly in Python, and ensuring your imports are placed strategically will keep your application running smoothly.

If you face any further issues, don't hesitate to revisit your settings, check your model definitions, and ensure you're adhering to Django's application structure requirements.

Keep coding, and happy developing!