我正在为CS50 W（网络）工作4。我有一个奇怪的问题，我刚刚注意到：
网址：urls.py

from django.urls import path

from . import views

urlpatterns = [
    path("", views.index, name="index"),
    path("login", views.login_view, name="login"),
    path("logout", views.logout_view, name="logout"),
    path("register", views.register, name="register"),
    path("create_post", views.create_post, name="create_post"),
    path("<str:username>", views.profile, name="profile")
]

字符串
视图给出问题：

def profile(request, username):

    user = User.objects.get(username=username)
    posts = Post.objects.filter(owner=user).order_by('-timestamp')

    print(f'Current username: {user.username} ({user.email})')

    return render(request, 'network/profile.html', {
        'username': user,
        'followed': user.followers.filter(username=request.user.username),
        'posts': posts
    })

型
终端日志：

**Current username: FernandoBorea (fernando@email.com)**
[26/Jul/2023 00:40:25] "GET /FernandoBorea HTTP/1.1" 200 2651
Internal Server Error: /favicon.ico
Traceback (most recent call last):
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/fernandoborea/studies/CS50W/TestingCICD/project4/cs50w-project4/network/views.py", line 104, in profile
    user = User.objects.get(username=username)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/db/models/manager.py", line 87, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/db/models/query.py", line 637, in get
    raise self.model.DoesNotExist(
network.models.User.DoesNotExist: User matching query does not exist.
[26/Jul/2023 00:40:26] "GET /favicon.ico HTTP/1.1" 500 71927

型
正如你所看到的，user变量在打印到终端时确实获得了一个User示例，站点上的一切都很完美，但我不知道为什么我会在终端上报告错误。另一件奇怪的事情是，在加载默认路由（索引）时，它也显示错误，即使没有调用给出问题的视图。
任何帮助是高度赞赏！

更新更多日志

出于某种原因，即使访问索引路由（'/'），它仍然显示来自未被请求的视图的错误。
附加日志，这次它显示加载索引页面，然后导航到用户的页面：

[26/Jul/2023 01:52:40] "GET / HTTP/1.1" 200 3667
Internal Server Error: /favicon.ico
Traceback (most recent call last):
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/fernandoborea/studies/CS50W/TestingCICD/project4/cs50w-project4/network/views.py", line 104, in profile
    user = User.objects.get(username=username)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/db/models/manager.py", line 87, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/db/models/query.py", line 637, in get
    raise self.model.DoesNotExist(
network.models.User.DoesNotExist: User matching query does not exist.
[26/Jul/2023 01:52:42] "GET /favicon.ico HTTP/1.1" 500 71940
Current username: FernandoBorea (fernando@email.com) (True)
[26/Jul/2023 01:52:44] "GET /FernandoBorea HTTP/1.1" 200 2651
Internal Server Error: /favicon.ico
Traceback (most recent call last):
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/fernandoborea/studies/CS50W/TestingCICD/project4/cs50w-project4/network/views.py", line 104, in profile
    user = User.objects.get(username=username)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/db/models/manager.py", line 87, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/fernandoborea/.local/lib/python3.10/site-packages/django/db/models/query.py", line 637, in get
    raise self.model.DoesNotExist(
network.models.User.DoesNotExist: User matching query does not exist.
[26/Jul/2023 01:52:44] "GET /favicon.ico HTTP/1.1" 500 71953

型

更新2，型号

from django.contrib.auth.models import AbstractUser
from django.db import models

class User(AbstractUser):
    id = models.AutoField(primary_key=True)
    following = models.ManyToManyField(to='User', related_name='followers_relname', symmetrical=False, blank=True)
    followers = models.ManyToManyField(to='User', related_name='following_relname', symmetrical=False, blank=True)

class Post(models.Model):
    id = models.AutoField(primary_key=True)
    owner = models.ForeignKey(to=User, on_delete=models.CASCADE, related_name='owner')
    post = models.TextField(max_length=1000)
    timestamp = models.DateTimeField(auto_now_add=True)
    likes = models.ManyToManyField(to=User, related_name='liked_posts', blank=True)

    def __str__(self):
        return f'{self.owner}: {self.post}'

型