我认为没有必要同时拥有Profile Model和Custom User Model。因为，当您自定义用户模型时，为什么不将Profile模型的字段也放到用户模型中。你可以像这样：

model

def upload_to(instance, filename):

now = timezone_now()
base, ext = os.path.splitext(filename)
ext = ext.lower()
return "profile/{now:%Y/%m/%Y%m%d%H%M%S}{ext}"

class User(AbstractUser):

name = models.CharField(_('Name of User'), blank=True, 
max_length=255)
school = models.CharField(max_length=30, null=True, blank=True)
image = models.ImageField(_("Picture"), upload_to=upload_to, 
                          null=True, blank=True)

def __str__(self):
    return self.username

def get_absolute_url(self):
    return reverse('users:detail', kwargs={'username': 

self.username})

views

@login_required
def add_image(request):

 form = ProfileImageForm(data=request.POST or None, file=request.FILES or None, instance=request.user)
 if request.method == "POST":

    if form.is_valid():
         form.save()
         return redirect('userPage')

 return render(request, "users/user_image_form.html", {"form": form
    })

forms.py

class ProfileImageForm(forms.ModelForm):

class Meta:
    model = User
    fields = ["image"]

这是因为在您的Profile模型中，您将user列添加为ForeignKey，强制执行NOT NULL以便抛出错误。要解决这个问题，您需要修改add_image类似这样的方法

@login_required
def add_image(request):

 form = ProfileImageForm()
 #form.user = request.user
 if request.method == "POST":
     form = ProfileImageForm(data=request.POST, files=request.FILES)
 if form.is_valid():
     form = form.save(commit=False) # change is here
     form.user=request.user.pk # change is here
     form.save()
     return redirect('userPage')
 else:
     return render(request, "users/user_image_form.html", {"form": form

该request.user.pk值得到，如果您已经登录，但如果你是在您登录需要assisn form.user = your_specified_id其ID存在于User表。如果您的情况是，您是管理员，并且您需要将图像添加到其他用户，因此您需要在add_image方法中传递用户ID 。

在字段列表中ProfileImageForm.py 添加添加user