如何在Django中显示自连接字段？

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=100)
    parent = models.ForeignKey('self', null=True, blank=True, on_delete=models.CASCADE)

python manage.py makemigrations
python manage.py migrate

from django.shortcuts import render
from .models import Category

def category_list(request):
    categories = Category.objects.all()
    return render(request, 'category_list.html', {'categories': categories})

<!-- category_list.html -->
<ul>
    {% for category in categories %}
        <li>{{ category.name }}</li>
        {% if category.parent %}
            <ul>
                <li>{{ category.parent.name }}</li>
            </ul>
        {% endif %}
    {% endfor %}
</ul>