Django project error: TypeError: 'module' object is not subscriptable

Question

I am learning about Django and Rest Framework, I have a little project to practice, but I have an error when trying to access http://localhost:8000/admin: TypeError: object 'module' is not subscribable.

These are the Python files I created:

admin.py:

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.utils.translation import gettext as _

from . import models


class UserAdmin(BaseUserAdmin):
    ordering = ['id']
    list_display = ['email', 'name']
    fieldsets = (
        (None, {'fields': ('email', 'password')}),
        (_('Personal Info'), {'fields': ('name',)}),
        (
            _('Permissions'),
            {
                'fields': (
                    'is_active',
                    'is_staff',
                    'is_superuser',
                )
            }
        ),
        (_('Important dates'), {'fields': ('last_login',)}),
    )
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ('email', 'password1', 'password2')
        }),
    )


admin.site.register(models.User, UserAdmin)

This is the Traceback:

Traceback (most recent call last): File "/home/jesus/.local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner response = get_response(request)

File "/home/jesus/.local/lib/python3.8/site-packages/django/core/handlers/base.py", line 115, in _get_response response = self.process_exception_by_middleware(e, request)

File "/home/jesus/.local/lib/python3.8/site-packages/django/core/handlers/base.py", line 113, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func response = view_func(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/contrib/admin/sites.py", line 407, in login return LoginView.as_view(**defaults)(request)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/generic/base.py", line 71, in view return self.dispatch(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/utils/decorators.py", line 43, in _wrapper return bound_method(*args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/decorators/debug.py", line 76, in sensitive_post_parameters_wrapper return view(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/utils/decorators.py", line 43, in _wrapper return bound_method(*args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/utils/decorators.py", line 130, in _wrapped_view response = view_func(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/utils/decorators.py", line 43, in _wrapper return bound_method(*args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func response = view_func(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/contrib/auth/views.py", line 63, in dispatch return super().dispatch(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/generic/base.py", line 97, in dispatch return handler(request, *args, **kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/generic/edit.py", line 133, in get return self.render_to_response(self.get_context_data())

File "/home/jesus/.local/lib/python3.8/site-packages/django/contrib/auth/views.py", line 96, in get_context_data context = super().get_context_data(**kwargs)

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/generic/edit.py", line 66, in get_context_data kwargs['form'] = self.get_form()

File "/home/jesus/.local/lib/python3.8/site-packages/django/views/generic/edit.py", line 33, in get_form return form_class(**self.get_form_kwargs())

File "/home/jesus/.local/lib/python3.8/site-packages/django/contrib/auth/forms.py", line 204, in init self.fields['username'].max_length = username_max_length

TypeError: 'module' object is not subscriptable

Pretty sure this is a known bug in the admin... with python 3.8... — Melvyn
Nope, this is python 3.8 with Django 3.x. THere's no local code reference in the tb, I don't get how you managed to override self.fields with a module reference. — Melvyn
I cannot reproduce this with python 3.8.3 and Django 3.0.8. Whether I use decorator or not doesn't make a difference. How you get to an error in the AuthenticationForm is also beyond me. You error must be in code that you're not showing, cause I'm doing pretty much the same as you are with the UserAdmin. — Melvyn

Balaji Sundar Balaji Sundar · Accepted Answer · 2020-07-14T19:15:10

Did you try giving different name to your class? 'UserAdmin' class that you have defined may clash with the 'django.contrib.auth.admin' - UserAdmin.

Django project error: TypeError: 'module' object is not subscriptable

1 Answers