Django基于添加表单编辑表单？

from .models import Person
from .forms import PersonForm

def edit_person(request, person_id):
    # 获取要编辑的Person对象
    person = Person.objects.get(id=person_id)

    # 创建一个表单实例，并将Person对象作为实例数据传递
    form = PersonForm(request.POST or None, instance=person)

    # 如果请求为POST请求，则验证表单数据并保存
    if request.method == 'POST':
        if form.is_valid():
            form.save()
            return redirect('person_list')

    # 渲染编辑表单页面
    context = {
        'form': form,
    }
    return render(request, 'edit_person.html', context)

<form method="post">
    {% csrf_token %}
    {{ form.as_p }}
   <button type="submit">保存</button>
</form>