如何在Django中显示子类别在父类别中的产品？

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=100)

class SubCategory(models.Model):
    name = models.CharField(max_length=100)
    parent_category = models.ForeignKey(Category, on_delete=models.CASCADE)

from django.shortcuts import render
from .models import Category, SubCategory, Product

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

{% for category in categories %}
    <h2>{{ category.name }}</h2>
    <ul>
        {% for subcategory in category.subcategory_set.all %}
            <li>{{ subcategory.name }}</li>
            <ul>
                {% for product in subcategory.product_set.all %}
                    <li>{{ product.name }}</li>
                {% endfor %}
            </ul>
        {% endfor %}
    </ul>
{% endfor %}