AttributeError at /admin 'AnonymousUser' object has no attribute 'first_name'

Question

I've deployed my Django project on Heroku. Now when I'm trying to access the admin page url/admin , I'm getting

AttributeError at /admin

'AnonymousUser' object has no attribute 'first_name'

If I'm running the same code locally, there's no issue with the admin page. It opens fine.

So problem is with this line actually in views.py

/app/exam/views.py in topic_view

    Line:59 |   fname = request.user.first_name

So my problem is why views.py is being called when I'm trying to open the admin site.

edit:

This is the urls.py file for app 'exam'

from django.urls import path

from . import views

urlpatterns = [
    path("", views.index, name="index"),
    path("login", views.login_view, name="login"),
    path("search", views.search_view, name="search"),
    path("logout", views.logout_view, name="logout"),
    path("register", views.register_view, name="register"),
    path("<str:subject_code>", views.topic_view, name="topics"),
    path("instructions/<int:topic_id>", views.instruction_view, name="instructions"),
    path("test/<int:topic_id>", views.test_view, name="test"),
    path("test/score/<int:topic_id>", views.score_calculator, name="score"),
    
]

and this is the urls.py for project 'quiz'

from django.contrib import admin
from django.urls import include, path

urlpatterns = [
    path("admin/", admin.site.urls),
    path("", include("exam.urls")),
]

Answer 1

由于您有 AnonymousUser 错误，这意味着用户未登录，并且由于他/她未登录，因此他/她不能拥有任何属性，例如 username、first_name 等。