如何从扩展用户模型中检索数据

我正在尝试通过 django 制作一个简单的注册/登录页面。我使用了 UserCreationForm 并使用了模型 UserProfile 来扩展用户模型。我想在用户登录后检索从表单 ie 部门发布的数据。我是 django 的新手，因此我们将不胜感激。提前致谢

表格.py

from django import forms
from django.contrib.auth.forms import UserCreationForm 
from django.contrib.auth.models import User
from mysite.core.models import UserProfile
from django.db import models

class SignUpForm(UserCreationForm):
    first_name = forms.CharField(max_length=30, required=False, help_text='Optional.')
    department = forms.CharField(max_length=30)
    last_name = forms.CharField(max_length=30, required=False, help_text='Optional.')
    email = forms.EmailField(max_length=254, help_text='Required. Inform a valid email address.')

    class Meta:
        model = User
        fields = ('username', 'first_name', 'last_name', 'email','password1', 'password2', 'department',)

    def save(self, commit=True):
        # Save the provided password in hashed format
        user = super(SignUpForm, self).save(commit=False)
        user_profile = UserProfile(user=user, department=self.cleaned_data['department'])
        user.save()
        user_profile.save()
        return user, user_profile

视图.py

from django.contrib.auth.decorators import login_required
from django.contrib.auth import login, authenticate
from django.shortcuts import render, redirect
from mysite.core.forms import SignUpForm

@login_required
def home(request):
    return render(request, 'home.html')

def signup(request):
    if request.method == 'POST':
        form = SignUpForm(request.POST)
        if form.is_valid():
            user,user_profile = form.save(commit=False)
            username = user.cleaned_data.get('username')
            raw_password = user.cleaned_data.get('password1')
            user = authenticate(username=username, password=raw_password)
            login(request, user)
            return redirect('home')
    else:
        form = SignUpForm()
    return render(request, 'signup.html', {'form': form})

模型.py

from django.db import models
from django.contrib.auth.models import User
class UserProfile(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE,unique=True)
    department = models.CharField(max_length=500, blank=True)

模板中的 home.html：

{% extends 'base.html' %}
{% block content %}
<h2>Welcome, <small>{{ user.username }}</small>!</h2>
<p>Your email address: {{ user.email }}</p>
<p>Department: {{ user_profile.department }}</p>
{% endblock %}

我可以打印用户名和电子邮件，但部门空了。