Question

我想提交表单F，清除其字段，但仍显示其中一个字段。 F提交到一个视图，该视图呈现首先显示它的模板

为此，我返回一个HttpResponseRedirect对象，而不是使用请求呈现模板：

def home(request):

    if request.method == 'POST':
        form = New_mini_url_form(request.POST)
        if form.is_valid():
            if (MiniUrl.objects.filter(url=form.cleaned_data['url']).count() == 0):
                code = form.cleaned_data['code']
                request.session["code"] = code
                [... stuff ...]

                return HttpResponseRedirect(reverse(home))

            else:
                code = form.cleaned_data['code']
                request.session["code"] = code
                [... stuff ...]

                return HttpResponseRedirect(reverse(home))
        else:
            return render(request, 'mini_url/home.html', locals())

    else:
        form = New_mini_url_form()
        return render(request, 'mini_url/home.html', locals())

我的模板中有{{ request.session.code}}

以下是project / settings.py

的摘录

TEMPLATE_CONTEXT_PROCESSORS = (
    "django.contrib.auth.context_processors.auth",
    "django.core.context_processors.debug",
    "django.core.context_processors.i18n",
    "django.core.context_processors.media",
    "django.core.context_processors.static",
    "django.core.context_processors.tz",
    "django.contrib.messages.context_processors.messages",
    "django.core.context_processors.request"
)

谢谢！

Answer 1

您可以在会话中设置code变量。然后使用模板中的request.session.code访问它。

def home(request):

    if request.method == 'POST':
        form = New_mini_url_form(request.POST)
        if form.is_valid():
            if (MiniUrl.objects.filter(url=form.cleaned_data['url']).count() == 0):
                code = form.cleaned_data['code']
                request.session['code'] = code # set code in the session
                [... stuff ...]

                return HttpResponseRedirect(reverse(home))

            else:
                code = form.cleaned_data['code']
                request.session['code'] = code # set code in the session
                [... stuff ...]

                return HttpResponseRedirect(reverse(home))
        else:
            return render(request, 'mini_url/home.html', locals())

    else:
        form = New_mini_url_form()
        return render(request, 'mini_url/home.html', locals())

然后在您的模板中，您可以通过以下方式访问code

{{request.session.code}} # display code in the template

您必须在设置中加入django.core.context_processors.request。

TEMPLATE_CONTEXT_PROCESSORS = (
  ...
  'django.core.context_processors.request', # will pass request in the template
  ...
)

来自request context processor的Django 1.7文档：

django.core.context_processors.request

如果TEMPLATE_CONTEXT_PROCESSORS包含此处理器，则每个   RequestContext将包含一个变量请求，它是当前的   HttpRequest的。请注意，默认情况下不启用此处理器;   你必须激活它。

如何清除表单但仍显示其中一个字段？

1 个答案: