如何在Django中实现跨两个不同模型的元素排序？

# models.py
from django.db import models

class ModelA(models.Model):
    name = models.CharField(max_length=100)
    sort_order = models.IntegerField()

class ModelB(models.Model):
    name = models.CharField(max_length=100)
    sort_order = models.IntegerField()
    model_a = models.ForeignKey(ModelA, on_delete=models.CASCADE)

# views.py
from django.shortcuts import render
from .models import ModelA, ModelB

def my_view(request):
    model_a_instances = ModelA.objects.all()
    sorted_model_a_instances = sorted(model_a_instances, key=lambda x: x.sort_order)

    # 获取与ModelA关联的ModelB实例列表
    model_b_instances = ModelB.objects.filter(model_a__in=sorted_model_a_instances)
    sorted_model_b_instances = sorted(model_b_instances, key=lambda x: x.sort_order)

    context = {
        'model_a_instances': sorted_model_a_instances,
        'model_b_instances': sorted_model_b_instances,
    }
    return render(request, 'my_template.html', context)

# my_template.html
<ul>
{% for model_a_instance in model_a_instances %}
    <li>
        {{ model_a_instance.name }}
        <ul>
        {% for model_b_instance in model_b_instances %}
            {% if model_b_instance.model_a == model_a_instance %}
                <li>{{ model_b_instance.name }}</li>
            {% endif %}
        {% endfor %}
        </ul>
    </li>
{% endfor %}
</ul>