在Django中传递消息时重定向 [英] Redirect while passing message in django

问题描述

在检查用户是否存在user_settings后，我尝试运行重定向(如果不存在-将用户带到表单中进行输入和保存).

I'm trying to run a redirect after I check to see if the user_settings exist for a user (if they don't exist - the user is taken to the form to input and save them).

我想将用户重定向到适当的表单，并向他们显示必须保存设置"的消息，以便他们知道为什么要重定向他们.

I want to redirect the user to the appropriate form and give them the message that they have to 'save their settings', so they know why they are being redirected.

函数如下:

def trip_email(request):
    try:
        user_settings = Settings.objects.get(user_id=request.user.id)
    except Exception as e:
        messages.error(request, 'Please save your settings before you print mileage!')
        return redirect('user_settings')

此功能检查用户设置并适当地重定向我-但该消息永远不会出现在模板顶部.

This function checks user settings and redirects me appropriately - but the message never appears at the top of the template.

您可能首先想到:您的Django中是否正确设置了消息?"

我还有其他功能，可以使用不是 重定向的消息，消息在模板中按预期显示，没有问题.邮件已正确集成到我的模板中，并且可以正常工作.

I have other functions where I use messages that are not redirects, the messages display as expected in the template there without issue. Messages are integrated into my template appropriately and work.

仅当我使用redirect时，我才看不到正在发送的消息.

Only when I use redirect do I not see the messages I am sending.

如果我像下面那样使用render，我会看到消息(但是，URL不会改变-我希望发生这种情况).

If I use render like the following, I see the message (but of course, the URL doesn't change - which I would like to happen).

def trip_email(request):
    try:
        user_settings = Settings.objects.get(user_id=request.user.id)
    except Exception as e:
        messages.error(request, 'Please save your settings before you print mileage!')
        form = UserSettingsForm(request.POST or None)
        return render(request, 'user/settings.html', {'form': form})

我还有其他一些地方需要使用redirect，因为这样做在功能上是合理的-但我也想将消息传递给那些重定向.

I have a few other spots where I need to use a redirect because it functionally makes sense to do so - but I also want to pass messages to those redirects.

user_settings函数如下所示:

def user_settings(request):
    try:
        user_settings = Settings.objects.get(user_id=request.user.id)
        form = UserSettingsForm(request.POST or None, instance=user_settings)
    except Settings.DoesNotExist:
        form = UserSettingsForm(request.POST or None)
    if request.method == 'POST':
        settings = form.save(commit=False)
        settings.user = request.user
        settings.save()
        messages.warning(request, 'Your settings have been saved!')

    return render(request, 'user/settings.html', {'form': form})

我在文档中找不到任何内容，说明您无法使用重定向发送邮件...但是我不知道如何显示它们.

I can't find anything in the documentation saying that you can't send messages with redirects... but I can't figure out how to get them to show.

这就是我在模板中呈现消息的方式:

This is how I render the messages in the template:

{% for message in messages %}
  <div class="alert {{ message.tags }} alert-dismissible" role="alert">
    <button type="button" class="close" data-dismiss="alert" aria-label="Close">
      <span aria-hidden="true">&times;</span>
    </button>
    {{ message }}
  </div>
{% endfor %}

我不确定这是否重要-但似乎它几乎从某个地方两次调用'GET'.

I'm not sure if it matters - but it looks like it's almost calling 'GET' twice from somewhere.

这两个URL的URL部分如下所示:

the URL section looks like this for these two URLS:

# ex: /trips/email
url(r'^trips/email/$', views.trip_email, name='trip_email'),
# ex: /user/settings
url(r'^user/settings/$', views.user_settings, name='user_settings'),

推荐答案

不，我认为最好的方法是使用您的会话.

Nope I think the best way is to use your sessions.

处理您的表格

def handle_form(request):
    ...
    request.session['form_message'] = "success or fail message here"

    redirect('/destination/', {})

def page_to_render_errors():
    ...
    message = None
    if( 'form_message' in request.session ):
        message = request.session['form_message']
        del request.session['form_message']
        messages.success = (request, message ) #<< if you choose to pass it through django's messaging

    render(request,'template_name.html', {'message_disp':message })

如果你们都有更好的方法打我. 编码愉快！

If y'all got a better way hit me up. Happy coding!

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