异常类型：DoesNotExist |配置文件匹配查询不存在

Question

我试图在 URL 模式中获取用户名而不是 id <a class="dropdown-item" href="{% url 'UserApp:profile' username=profile.username%}">Profile</a>，因此在注销功能中出现错误：配置文件匹配查询不存在。但是配置文件模板正在渲染将所有查询都没有任何错误。如果我在 URL 中也使用 id 一切正常！请向我建议如何摆脱错误。谢谢！

Views.py

def logout_view(request):
    logout(request)
    return redirect("index")


@login_required
def profile(request, username):
    title = 'Profile'
    context={'title': title}
    profile = Profile.objects.get(username=username)
    if profile:
        context.update(profile = profile)
    else:
        return HttpResponse("user is not found")
    return render(request, 'UserApp/profile.html', context)

Urls.py

from django.urls import path
from UserApp import views

app_name = 'UserApp'

urlpatterns = [
    path('<str:username>/', views.profile, name='profile'),
    path('signup/', views.signup, name='signup'),
    path('login/', views.login_view, name='login'),
    path('logout/', views.logout_view, name='logout'),
    path('update/', views.update_profile, name='update'),
]

我使用 BaseUserManager、AbstractBaseUser 进行用户注册和客户档案模型来获取用户名

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='profile')
    username = models.CharField(max_length=264, null=True, blank=True)
    full_name = models.CharField(max_length=264, blank=True)
    address_1 = models.TextField(max_length=300, blank=True)
    city = models.CharField(max_length=40, blank=True)
    zipcode = models.CharField(max_length=10, blank=True)
    country = models.CharField(max_length=50, blank=True)
    date_joined = models.DateTimeField(auto_now_add=True)
    pro_pic = models.ImageField(upload_to=None, blank=True)
    about = models.CharField(max_length=500, blank=True)

    def __str__(self):
        return self.username

    def is_fully_filled(self):
        fields_names = [f.name for f in self._meta.get_fields()]

        for field_name in fields_names:
            value = getattr(self, field_name)
            if value is None or value == '':
                return False
        return True

终端出错

  File "C:\Users\SONJOY\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\SONJOY\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\auth\decorators.py", line 21, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "D:\TrackingSystem\UserApp\views.py", line 49, in profile
    profile = Profile.objects.get(username=username)
  File "C:\Users\SONJOY\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\SONJOY\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 429, in get
    raise self.model.DoesNotExist(
UserApp.models.Profile.DoesNotExist: Profile matching query does not exist.
[15/Apr/2021 09:52:47] "GET /user/logout/ HTTP/1.1" 500 77227

Answer 1

如果您访问/logout url，它将匹配profile 视图，因为这是匹配的第一个url 模式。你应该把它放在最后，这样signup、login、logout等视图首先匹配，只有当这些失败时，你“解雇”profile视图，所以：

from django.urls import path
from UserApp import views

app_name = 'UserApp'

urlpatterns = [
    path('signup/', views.signup, name='signup'),
    path('login/', views.login_view, name='login'),
    path('logout/', views.logout_view, name='logout'),
    path('update/', views.update_profile, name='update'),    
    # put this last ↓
    path('<str:username>/', views.profile, name='profile'),
]