Adding extra_context in Django logout built-in view - django

Question

In django/contrib/auth/views.py there is the definition of the logout view :
def logout(request, next_page=None,
template_name='registration/logged_out.html',
redirect_field_name=REDIRECT_FIELD_NAME,
current_app=None, extra_context=None):
I would like to add extra_context to get rid of the 'Logged out' title that appear when I log off
so I'm trying this in my url confs :
(r'^accounts/logout/$', logout(extra_context={'title':'something else'}) ),
but then I get this error : logout() takes at least 1 non-keyword argument (0 given)
what I'm doing wrong?
ps:
when I do
(r'^accounts/logout/$', logout ),
it works, but then I get the 'Logged out' text...
Thanks,
Fred

Answer 1

When you write logout(extra_context={'title':'something else'}), you're actually calling logout right there in the URLconf, which won't work. Any URLconf tuple can have an optional third element, which should be a dictionary of extra keyword arguments to pass to the view function.
(r'^accounts/logout/$', logout, {'extra_context':{'title':'something else'}}),
Alternatively, you could write your own view which calls logout passing in whatever arguments you want -- that's typically how you would "extend" function-based generic views in more complicated cases.

Answer 2

Adding my findings for django 2.0 as the previous answer on this thread no longer works for the most recent django version.
With 2.0, the proper way of adding a URL to your urls.py file is by using path():
from django.urls import path
from django.contrib.auth import views as auth_views
path('accounts/logout/', auth_views.LogoutView.as_view(
extra_context={'foo':'bar'}
)),
The code snippet to highlight here is the .as_view() function. Django 2.0 implements auth views as classes. You can read more about this in the Authentication Views documentation
You then "convert" the class to a view using `.as_view() and you are able to pass in any class attributes defined in the source code as named parameters.
Passing in extra_context (which defaults to None) automatically exposes these context variables to your templates.
You can access the source code for LogoutView by following this python path: django.contrib.auth.views
Here you can see the other class attributes you can pass into LogoutView and the other auth view classes.

Answer 3

I had a similar problem with titles and generic views in django 1.11 (though the problem was mostly that I didn't switch docs version from 2.0). I wanted to pass title via extra_context to the view inherited from CreateView, and discovered that django's generic view had no such attribute. So, here are my crutches:
Create custom mixin (hope that's more or less what ContextMixin in 2.0 does):
class ExtraContextMixin():
extra_context = {}
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context.update(self.extra_context)
return context
Add mixin to view's ancestors (that's all code I had to change):
class CustomView(ExtraContextMixin, CreateView):
Pass extra_context from url:
url(r'^custom-view/$', views.CustomView.as_view(extra_context={'title': 'just any'}), name='custom-view')
Unfortunately, I have no idea whether such solution is acceptable (no need since 2.0, obviously), but at least it's working.