Django Contrib Auth + Class Based Generic Views

[Matheus Ashton]

Hello Everybody,

I'm having a problem using the django.contrib.auth app and class based generic views in Django 1.3 / 1.4:

After submitting the login form, my view receives the post data and tries to authenticate the user and then redirect to a success page. Ok nothing new..

The problem is: My HomeView wich extends the TemplateView, receive the redirect from the login form and uses a render_to_response function to render the template, and that is my problem, because render_to_response does not create a RequestContext object, the one I need to show the newly authenticated user data, because that is a requirement for django.contrib.auth app, if the request is not a RequestContext, the authenticated user data, is not passed to the template (https://docs.djangoproject.com/en/1.4/topics/auth/#authentication-data-in-templates)..

Does someone can help me with this problem?

PS: Sorry about my English, it is not my first language

Thanks :D

[Sergiy Khohlov]

Please provide your urls.py and your view which is used for this ....

2012/4/3 Matheus Ashton <matheu...@gmail.com>:

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[Matheus Ashton]

urls.py:

urlpatterns = patterns('',

    url(r'^/login$', LoginView.as_view()),

    url(r'^$', HomeView.as_view(), {}, 'home'),

)

settings.py:

  LOGIN_URL='/login/'

views.py:

class LoginView(FormView):

  form_class = LoginForm

  template_name = "auth/form.html"

  

  def post(self, request, *args, **kwargs):

    form = self.get_form(self.get_form_class()) 

    if form.is_valid():

      user = self.request['login']

      password = self.request['password']

      try:

        auth = Authenticator()

        auth.authenticate(user, password, self.request)

        return self.form_valid(form)

  def get_success_url(self):

    return reverse('home')

class HomeView(TemplateView):

   template_name = 'user/home.html'

components.py: 

class Authenticator():

  def authenticate(self, user, password, request = None):

    self.user = auth.authenticate(username=user, password=password)

    if request:

      return self.login(request)

    

    return self.user

  

  def login(self, request):

    if self.user is not None:

      if self.user.is_active:

        auth.login(request, self.user)

        return self.user

      else:

        raise UserDisabledException("Usuario inativo")

    else:

      raise InvalidLoginException("Usuario/Senha invalidos")

           

class UserDisabledException(Exception):

  def __init__(self, value):

    self.value = value

    

  def __str__(self):

    return repr(self.value)

  

class InvalidLoginException(Exception):

  def __init__(self, value):

    self.value = value

    

  def __str__(self):

    return repr(self.value)

Thanks again :)

2012/4/3 Sergiy Khohlov <skho...@gmail.com>

[Sergiy Khohlov]

So much code .....
Ok, lets start

2012/4/4 Matheus Ashton <matheu...@gmail.com>:

> urls.py:
>
> urlpatterns = patterns('',
>     url(r'^/login$', LoginView.as_view()),
>     url(r'^$', HomeView.as_view(), {}, 'home'),
> )
>

More simple way is using decorator for checking if user is authorized.

Add next string to your urls.py

# import decorator functionality
from django.contrib.auth.decorators import login_required

# import your views

from home.views import HomeView

final urls.py is :

from django.conf.urls.defaults import patterns, include, url
from django.contrib.auth.decorators import login_required
from home.views import HomeView

# Uncomment the next two lines to enable the admin:
# from django.contrib import admin
# admin.autodiscover()

urlpatterns = patterns('',
(r'^login/', 'django.contrib.auth.views.login', {'template_name':
'login.html'}),
(r'^$', login_required(HomeView.as_view())),
)

First line is mean that default djano auth mechanism is used for
checking user's auth.
Socond line means : each request is passed to HomeView but should
be authorized. If user is not authorized then redirect to login
windows should be .

As result your views.py should be :

from django.views.generic import TemplateView
# Create your views here.
class HomeView(TemplateView):
template_name='home.html'

Only three lines of the code !
You dont need more!

Thanks,
Serge

[Javier Guerra Giraldez]

On Wed, Apr 4, 2012 at 4:14 AM, Sergiy Khohlov <skho...@gmail.com> wrote:
> As result  your views.py should be :
>
> from django.views.generic import TemplateView
> # Create your views here.
> class HomeView(TemplateView):
>    template_name='home.html'
>
>  Only three lines of the code !
> You dont  need more!

if in urls.py you replace

(r'^$', login_required(HomeView.as_view())),

with
(r'^$', login_required(TemplateView(template_name='home.html').as_view())),

you don't need any HomeView class!

--
Javier

[Sergiy Khohlov]

Sound good!
Usually project is not so simple (only url.py + settings.py)

2012/4/4 Javier Guerra Giraldez <jav...@guerrag.com>:

[Matheus Ashton]

Ok, Thanks for the advices :) but I still have the original problem, when i access the HomeView the template is rendered with a render_to_response view, with a simple Context object and not a RequestContext object, because of that I do not have the authenticated user data in my template...

2012/4/4 Sergiy Khohlov <skho...@gmail.com>

[Sergiy Khohlov]

As I understand you would like to send some values to the templates ?
Are you eould like to check if user is authenticated ?
I 've understand near to nothing from your last message.

2012/4/5 Matheus Ashton <matheu...@gmail.com>: