如何在Django中编辑内联表单集中的模型对象

from django.db import models

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

class ChildModel(models.Model):
    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE)
    child_name = models.CharField(max_length=100)

from django.forms import inlineformset_factory

ChildModelFormSet = inlineformset_factory(ParentModel, ChildModel, fields=('child_name',), extra=1)

from django.shortcuts import render, get_object_or_404
from .models import ParentModel
from .forms import ChildModelFormSet

def edit_parent(request, parent_id):
    parent = get_object_or_404(ParentModel, pk=parent_id)
    formset = ChildModelFormSet(instance=parent)

    if request.method == 'POST':
        formset = ChildModelFormSet(request.POST, instance=parent)
        if formset.is_valid():
            formset.save()
            # 保存成功后的处理

    return render(request, 'edit_parent.html', {'formset': formset})

<!-- edit_parent.html -->
<form method="post">
    {% csrf_token %}
    {{ formset.management_form }}
    {% for form in formset %}
        {{ form }}
    {% endfor %}
    <input type="submit" value="保存">
</form>