Django 1.6 - Messages not showing

Question

Im trying to get the message framework in django to work.

Here is the interesting bits of my settings.py

INSTALLED_APPS = (
    'django.contrib.sessions',
    'django.contrib.messages',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
)

I have not added anything to TEMPLATE_CONTEXT_PROCESSORS, so it is the default value.

My view, where I want the message to display:

from django.contrib.messages import get_messages

class ProfileFrontpage(TemplateView):

    def get(self, request, *args, **kwargs):
        if request.user.is_authenticated():

            #Get messages
            messages = get_messages(request)

            #Get the user            
            user = self.request.user

            #Used benefit
            used_benefit_list = Benefit.published.filter(used_benefit__user = user)

            return render(request, "accounts/frontpage.html", {"messages": messages, "used_benefit_list": used_benefit_list})
        else:
            return render(request, 'accounts/not_authenticated.html')

Template:

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

And here is my form that should create a message when the form is valid:

def show_profileform(request):       
    if request.user.is_authenticated():
        user = request.user

        ProfileFormInlineFormSet = inlineformset_factory(User, Profile, form=ProfileForm, can_delete=False)

        if request.method == "POST":
            form = UserForm(request.POST, request.FILES, instance=request.user, prefix="main")
            formset = ProfileFormInlineFormSet(request.POST, request.FILES, instance=request.user, prefix="nested")        
            if 'submit' in request.POST:
                if form.is_valid() and formset.is_valid():

                    u = User.objects.get(username = request.user)                    

                    #Save to database
                    user = form.save()
                    profile = formset.save()

                    messages.success(request, "Settings updated", extra_tags='alert-success')

                    return HttpResponseRedirect('/accounts/')

        else:
            form = UserForm(instance=request.user, prefix="main")
            formset = ProfileFormInlineFormSet(instance=request.user, prefix="nested")

        return render(request, "accounts/form.html", {"form":form, "formset":formset})
    else:
        return render(request, 'accounts/not_authenticated.html')

Anyone know why the message is not visible?

Answer 1

The TEMPLATE_CONTEXT_PROCESSORS setting by default includes the messages context proceessor. So you don't need to do get_messages(request) in your view. In fact, it is harmful in your case: the call to get_messages() gets the messages and clears the message store. Then, the context processor tries to do the same, but doesn't find any, because your view cleared them. It then proceeds to set the messages key in your template context and overwrites the value from your view.

In short: remove messages handling from your ProfileFrontpage view and it should just work.