表单字段未存储在Django用户模型中

我有一份我在下面定义的报名表

形式。py

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

class SignUpForm(UserCreationForm):
    display_name = forms.CharField(max_length=30, required=True, help_text='Please provide a display name for your profile')
    class Meta:
        model = User
        fields = ('username', 'password1', 'password2', 'display_name')

在视图中。py,我负责注册过程

意见。py

from django.contrib.auth.models import User
from django.contrib.auth import login, authenticate
from .forms import SignUpForm
from django.shortcuts import render, redirect


@csrf_exempt
def signup_users(request):
    if request.method == 'POST':
        form = SignUpForm(request.POST)
        if form.is_valid():
            user = form.save(commit=False)
            username = form.cleaned_data.get('username')
            display_name = form.cleaned_data.get('display_name')
            raw_password = form.cleaned_data.get('password1')

            user.set_password(raw_password)
            user.display_name = display_name
            user.save()
            user = authenticate(username=username, password=raw_password)
            print("signup authencticate", user)
            login(request, user)
            return render(request, 'index.html')
    else:
        form = SignUpForm()
    return render(request, 'signup.html', {'form': form})

用户可以成功注册,但是 display_name 不会存储在django用户模型中。即使在django管理员中,我也看不到字段 显示你的名字 .我甚至做过这样的查询 serializers.serialize("json",User.objects.filter(username=username)) 但即使在这里,它也显示了除 显示你的名字 .

我做错了什么?