How do I redirect in Django with context?

问题

I have a view that validates and saves a form. After the form is saved, I'd like redirect back to a list_object view with a success message "form for customer xyz was successfully updated..."

HttpResponseRedirect doesn't seem like it would work, because it only has an argument for the url, no way to pass dictionary with it.

I've tried modifying my wrapper for object_list to take a dict as a parameter that has the necessary context. I the return a call to this wrapper from inside the view that saves the form. However, when the page is rendered, the url is '/customer_form/' rather than '/list_customers/'. I tried modifying the request object, before passing it to the object_list wrapper, but that did not work.

Thanks.

回答1:

Please note the answer suggested here is only applicable to Django < 1.2:

Do you have control over the view that you are redirecting to? In that case you can save the context in the session before redirecting. The target view can pick up the context (and delete it) from the session and use it to render the template.

If your only requirement is to display a message then there is a better way to do this. Your first view can create a message for the current using auth and have the second view read and delete it. Something like this:

def save_form(request, *args, **kwargs):
    # all goes well
    message = _("form for customer xyz was successfully updated...")
    request.user.message_set.create(message = message)
    return redirect('list_view')

def list_view(request, *args, **kwargs):
    # Render page

# Template for list_view:
{% for message in messages %}
   ... 
{% endfor %}

Messages are saved to the database. This means that you can access them even after a redirect. They are automatically read and deleted on rendering the template. You will have to use RequestContext for this to work.

For Django => 1.2 read the answer involving messages

回答2:

request.user.message_set was deprecated in Django 1.2 and has been removed since Django 1.4, the message framework should be used instead.

from django.contrib import messages

# messages.add_message(request, level, message, extra_tags='', fail_silently=False)
messages.add_message(request, messages.INFO, "Your Message")

Messages can then be rendered on the template with:

{% if messages %}
    <ul class="messages">
        {% for message in messages %}
            <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
        {% endfor %}
    </ul>
{% endif %}

回答3:

To expand on Antoine's helpful answer: if you want to process the messages in your views module, rather than the template:

from django.contrib.messages import get_messages

def my_view(request):
    # Process your form data from the POST, or whatever you need to do

    # Add the messages, as mentioned above
    messages.add_message(request, messages.INFO, form.cleaned_data['name'])

    return HttpResponseRedirect('/other_view_url/')

def other_view(request):
    storage = get_messages(request)
    name = None
    for message in storage:
        name = message
        break
    return render(request, 'general/other_view.html', {'name': name})

回答4:

I found the following to work if more than just a message needs to be added to the redirect:

from django.shortcuts import redirect
import urllib

def my_view(request):

    ...

    context = {'foo1': bar1, 'foo2': bar2, 'foo3': bar3}
    return redirect('/redirect_link/?' + urllib.parse.urlencode(context))

See also how to pass context data with django redirect function?

来源：https://stackoverflow.com/questions/3624422/how-do-i-redirect-in-django-with-context

标签

django

django-urls