如何在Django中更新数据库中用户输入的数据？

from django.shortcuts import render
from .forms import MyForm
from .models import MyModel

def update_data(request):
    if request.method == 'POST':
        form = MyForm(request.POST)
        if form.is_valid():
            # 获取要更新的对象
            obj = MyModel.objects.get(id=request.POST['id'])
            
            # 更新对象的字段
            obj.field1 = form.cleaned_data['field1']
            obj.field2 = form.cleaned_data['field2']
            
            # 保存更新后的数据
            obj.save()
            
            return render(request, 'success.html')
    else:
        form = MyForm()
    
    return render(request, 'update.html', {'form': form})