Django NOT NULL 约束失败：users_profile.slug

Question

我正在尝试自动创建用户配置文件，但它不起作用，所以我尝试使用管理面板添加它，它给了我这个错误

/admin/users/profile/add/ 处的 IntegrityError

NOT NULL 约束失败：users_profile.slug

这是我的用户配置文件模型：

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, null=True)
    image = models.ImageField(default='', upload_to='profile_pics')
    real_name = models.CharField(max_length=150)

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

    def save(self, *args, **kwargs):
        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)

这里是创建配置文件的视图：

@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)
        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('/')

    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)

自动轮廓生成信号：

@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()

Answer 1

正如 cmets 中提到的，主要问题是关于 makemigration 和 migrate。您面临的另一个问题（信号未发生）可以通过简单地加载信号来解决。

只需将此代码添加到您的应用目录中的apps.py：

from django.apps import AppConfig


class <your_app_name>Config(AppConfig):
    name = '<your_app_name>'

    def ready(self):                      # <---- add this
        import <your_app_name>.signals    # <---- add this