Question

我试图从django中获取一个帖子的值，但它传递一个空字段`def PersonEmail（request）：

if request.method == "POST":
    form1 = PersonForm(request.POST, prefix="form1")
    form2 = EmailForm(request.POST, prefix="form2")
    name = form2['email'].value
    return HttpResponse(name)
else:
    form1 = PersonForm()
    form2 = EmailForm()
    return render(request, 'CreatePersonEmail.html', locals())`

但当我把它们分开时，

Im trying to get the value form a post in django but it pass an empty field `def PersonEmail(request):

if request.method == "POST":
    # form1 = PersonForm(request.POST, prefix="form1")
    form2 = EmailForm(request.POST, prefix="form2")
    name = form2['email'].value
    return HttpResponse(name)
else:
    form1 = PersonForm()
    form2 = EmailForm()
    return render(request, 'CreatePersonEmail.html', locals())`

它给了我该领域的价值。

为什么呢？以及如何使它获取两个表单字段的值？

Answer 1

基本上，你做错了。

首先，您需要检查表单是否有效。用户可以输入任何废话，你不想让他们这样做：

if request.method == "POST":
    form = MyForm(request.POST)
    if form.is_valid():
        # Now you can access the fields:
        name = form.cleaned_data['name']

如果表单无效，只需将其传回render()即可显示错误。

另外，不要这样做：

return render(request, 'CreatePersonEmail.html', locals())`

正确构建您的上下文字典，不要使用locals()，这会让您的上下文受到污染。

所以完整视图可能看起来像这样（取自django docs并稍作改动：

def get_name(request):
    # if this is a POST request we need to process the form data
    if request.method == 'POST':
        # create a form instance and populate it with data from the request:
        form = NameForm(request.POST)
        # check whether it's valid:
        if form.is_valid():
            name = form.cleaned_data['name']
            return render(request, 'some_page.html', {'name': name})

    # if a GET (or any other method) we'll create a blank form
    else:
        form = NameForm()

    return render(request, 'name.html', {'form': form})

Answer 2

您需要在实例化表单时使用前缀;在GET和POST上都有。

此外，您可以从表单的cleaned_data字典中获取值，而不是来自字段。

POST不起作用

2 个答案: