python - 相关对象不存在。用户没有个人资料

Question

我已经阅读了这个(几乎)问题的其他一些答案，但它们没有帮助。我为用户和个人资料应用程序(？)混合了以下 2 个文件。
在其他答案中，他们说如果您不使用 >objects.get_or_create 或不制作signals.py 文件，则会发生这种情况，您会收到此错误，但我已经通过了这两种方式，但没有结果。
这是我得到的回溯:

Environment:


Request Method: GET
Request URL: http://127.0.0.1:3000/profile/

Django Version: 3.0.3
Python Version: 3.7.3
Installed Applications:
['blog',
 'users',
 'crispy_forms',
 'django_cleanup',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/.venv/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/.venv/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/.venv/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/.venv/lib/python3.7/site-packages/django/contrib/auth/decorators.py", line 21, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/mahoursanat/users/views.py", line 38, in profile
    p_form = ProfileUpdateForm(instance=request.user.profile)
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/.venv/lib/python3.7/site-packages/django/utils/functional.py", line 225, in inner
    return func(self._wrapped, *args)
  File "/home/wss/Desktop/projects/python/django/mahour_sanat/.venv/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py", line 423, in __get__
    self.related.get_accessor_name()

Exception Type: RelatedObjectDoesNotExist at /profile/
Exception Value: User has no profile.

表格.py:

from django import forms
from django.contrib.auth.models import User
from django.contrib.auth.forms import UserCreationForm
from .models import Profile


class UserRegisterForm(UserCreationForm):
    email = forms.EmailField()

    class Meta:
        model = User
        fields = ['username', 'email', 'password1', 'password2']


class UserUpdateForm(forms.ModelForm):
    email = forms.EmailField()

    class Meta:
        model = User
        fields = ['username', 'email']


class ProfileUpdateForm(forms.ModelForm):
    class Meta:
        model = Profile
        fields = ['image']

信号.py:

from django.db.models.signals import post_save
from django.contrib.auth.models import User
from django.dispatch import receiver
from .models import Profile


@receiver(post_save, sender=User)
def create_profile(sender, instance, created, **kwargs):
    if created:
        Profile.objects.create(user=instance)


@receiver(post_save, sender=User)
def save_profile(sender, instance, **kwargs):
    instance.profile.save()

配置文件模型的models.py:

from django.db import models
from django.contrib.auth.models import User
from PIL import Image


class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    image = models.ImageField(default='default.jpg', upload_to='profile_pics')

    def __str__(self):
        return f'{self.user.username} Profile'

    def save(self):
        super().save()

        img = Image.open(self.image.path)

        if img.height > 300 or img.width > 300:
            output_size = (300, 300)
            img.thumbnail(output_size)
            img.save(self.image.path)

这是 views.py 文件:

from django.shortcuts import render, redirect
from django.contrib import messages
from django.contrib.auth.decorators import login_required
from .forms import UserRegisterForm, ProfileUpdateForm, UserUpdateForm


def register(request):
    if request.method == 'POST':
        form = UserRegisterForm(request.POST)
        if form.is_valid():
            form.save()
            username = form.cleaned_data.get('username')
            messages.success(
                request, f'Your account has been created! You are now able to log in')
            return redirect('login')
    else:
        form = UserRegisterForm()
    context = {
        'form': form
    }
    return render(request, 'users/register.html', context)


@login_required
def profile(request):
    if request.method == 'POST':
        u_form = UserUpdateForm(request.POST, instance=request.user)
        p_form = ProfileUpdateForm(
            request.POST, request.FILES, instance=request.user.profile)
        if u_form.is_valid() and p_form.is_valid():
            u_form.save()
            p_form.save()
            messages.success(request, f'Your account has been updated!')
            return redirect('profile')
    else:

        u_form = UserUpdateForm(instance=request.user)
        p_form = ProfileUpdateForm(instance=request.user.profile)
    context = {
        'u_form': u_form,
        'p_form': p_form
    }
    return render(request, 'users/profile.html', context)

感谢您阅读本文:)。

附言正如我在管理页面中看到的，注册后没有配置文件(既不是来自站点也不是管理页面)。

Answer 1

很高兴看到有人在 Corey 的教程中练习 Django!我花了几天时间才发现出了什么问题。这是我如何做到的。

您的 views.py看起来像这样:

@login_required()
def profile(request):
    if request.method == 'POST':
        u_form = UserUpdateForm(request.POST, instance=request.user)
        p_form = ProfileUpdateForm(request.POST,
                                   request.FILES,
                                   instance=request.user.profile)

在 views.py 中添加一个所以它看起来像下面

@login_required()
def profile(request):
    Profile.objects.get_or_create(user=request.user)
    if request.method == 'POST':
        u_form = UserUpdateForm(request.POST, instance=request.user)
        p_form = ProfileUpdateForm(request.POST,
                                   request.FILES,
                                   instance=request.user.profile)

如果您碰巧遇到同样的问题，请创建一个新帐户并转到个人资料页面，看看它是否会引发任何错误。