无法将关键字“结果”解析为字段。 选项有：id、image_profile、user、user_id

Question

我是 Django 的新手，我正在尝试创建配置文件更新表单。 尝试更新我的个人资料时出现以下错误：

Cannot resolve keyword 'username' into field. Choices are: id, image_profile, user, user_id

这是我的models.py

from django.db import models
from django.shortcuts import render, redirect
from django.contrib import messages
from django.db import models
from django.contrib.auth.models import User
from django.db.models.signals import post_delete, pre_save
from django.dispatch import receiver
from django.utils.text import slugify
from django.conf import settings


class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    image_profile = models.ImageField(upload_to='media/profilepics', null=False, blank=False)


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

class Profile_update(models.Model):
        user = models.OneToOneField(User, on_delete=models.CASCADE)
        bio = models.CharField(max_length=50, null=False, blank=False)
        image_profile = models.ImageField(upload_to='media/profilepics', null=False, blank=False)

这是我的 forms.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):
    class Meta:
        model = User
        fields = ['username', 'password1', 'password2']


class ProfileAuthenticationForm(forms.ModelForm):
    password = forms.CharField(label='Password', widget=forms.PasswordInput)

    class Meta:
        model = Profile
        fields = ['user', 'password']

    def clean(self):
        if self.is_valid():
            user = self.cleaned_data['user']
            password = self.cleaned_data['password']
            if not authenticate(user=user, password=password):
                raise forms.ValidationError("Invalid login")


class ProfileUpdateForm(forms.ModelForm):
    class Meta:
        model = Profile
        fields = ['user', 'image_profile']
    def clean_user(self):
        if self.is_valid():
            username = self.cleaned_data['user']
            try:
                profile = Profile.objects.exclude(pk=self.instance.pk).get(username=username)
            except Profile.DoesNotExist:
                return user
            raise forms.ValidationError('User "%s" is already in use' % user)

我是编程新手。