如何在Django (Python)中对产品进行价格排序？

from myapp.models import Product

# 按价格升序排序
products_asc = Product.objects.all().order_by('price')

# 按价格降序排序
products_desc = Product.objects.all().order_by('-price')

from django.shortcuts import render
from myapp.models import Product

def product_list(request):
    sort_order = request.GET.get('sort', 'asc')  # 默认按升序排序
    if sort_order == 'asc':
        products = Product.objects.all().order_by('price')
    else:
        products = Product.objects.all().order_by('-price')
    
    return render(request, 'product_list.html', {'products': products})

<!-- product_list.html -->
<ul>
  {% for product in products|dictsortreversed:"price" %}
    <li>{{ product.name }} - ${{ product.price }}</li>
  {% endfor %}
</ul>

from myapp.models import Product

def custom_sort(products):
    return sorted(products, key=lambda p: p.price)

products = Product.objects.all()
sorted_products = custom_sort(products)

# 确保price字段不为空且为数字
products = Product.objects.filter(price__isnull=False).filter(price__regex=r'^\d+(\.\d+)?$').order_by('price')