Re: User authentication with either username or email.

[shashank sandela]

This helped alot and solved the issue.
Thanks

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Re: User authentication with either username or email.

[Tom Evans]

On Fri, Jun 14, 2013 at 3:29 PM, shashank sandela
 wrote:
> As you can see in the views.py I did import the class
> EmailOrUsernameModelBackend.

OK. But you mustn't import that class, you must allow django to import
it itself, and then django will use it when authenticating users.

You do this by specifying the class in
settings.AUTHENTICATION_BACKENDS, and then calling the function
authenticate() in your view, which you should import from
django.contrib.auth.

You are trying to call the method authenticate on your auth backend
directly. Do not do this, it is incorrect. It is because of this you
are getting the error "'User' object has no attribute 'backend'".

Please notice the difference between the **function** authenticate()
and the **method** authenticate() on your auth backend.

Your view should look like the view linked below:

https://docs.djangoproject.com/en/1.5/topics/auth/default/#how-to-log-a-user-in

Cheers

Tom

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Re: User authentication with either username or email.

[shashank sandela]

Sorry. The error was: 

AttributeError at /authentication/

'User' object has no attribute 'backend'

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Re: User authentication with either username or email.

[shashank sandela]

As you can see in the views.py I did import the class *
EmailOrUsernameModelBackend.*
*
*
Now when I used " *user = 
EmailOrUsernameModelBackend().authenticate(username=username, 
password=password) *"
It gave an error saying: 
AttributeError at /tangle/auth/

'User' object has no attribute 'backend'

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Re: User authentication with either username or email.

[Enyert Viñas]

El 14/06/2013 07:26 a.m., shashank sandela escribió:

unbound method authenticate() must be called with EmailOrUsernameModelBackend 
instance as first argument (got nothing instead)
Hi. Remember that you must import a function before you call it. This is 
a reference to authentication in Django 
https://docs.djangoproject.com/en/1.5/topics/auth/default/#how-to-log-a-user-in 



Regards.

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Re: User authentication with either username or email.

[Tom Evans]

On Fri, Jun 14, 2013 at 12:56 PM, shashank sandela
 wrote:
> Hi,
>
> I created a backends.py in my project folder.
>
> backends.py ::
>
> from django.conf import settings
> from django.contrib.auth.models import User
>
> class EmailOrUsernameModelBackend(object):
> def authenticate(self, username=None, password=None):
> if '@' in username:
> kwargs = {'email': username}
> else:
> kwargs = {'username': username}
> try:
> user = User.objects.get(**kwargs)
> if user.check_password(password):
> return user
> except User.DoesNotExist:
> return None
>
> def get_user(self, user_id):
> try:
> return User.objects.get(pk=user_id)
> except User.DoesNotExist:
> return None
>
> And in the views.py,
>
> from django.contrib import auth
> from django.contrib.auth.models import User
> from tangle.backends import EmailOrUsernameModelBackend
>
> def authentication(request):
> username = request.POST.get('username', '')
> password = request.POST.get('password', '')
> user = authenticate(username=username, password=password)
> if user is not None:
> auth.login(request, user)
> return HttpResponseRedirect('/loggedin/')
> else:
> return HttpResponseRedirect('/invalid_login')
>
> Settings.py
>
> AUTHENTICATION_BACKENDS = (
> 'backends.EmailOrUsernameModelBackend',
> 'django.contrib.auth.backends.ModelBackend'
> )
>
> Now when I login using either username or email it shows an error "global
> name 'authenticate' is not defined"

Yes. You must import this function before you can call it:

https://docs.djangoproject.com/en/1.5/topics/auth/default/#how-to-log-a-user-in

>
> So, I used
> user = EmailOrUsernameModelBackend.authenticate(username=username,
> password=password)
>
> It shows
>
> TypeError at /authentication/
>
> unbound method authenticate() must be called with
> EmailOrUsernameModelBackend instance as first argument (got nothing instead)
>

The EmailOrUsernameModelBackend.authenticate() method is an instance
method. You must call it with an instance of
EmailOrUsernameModelBackend, not as a class method. In fact, you do
not call it at all, you list the auth backends in settings.py, and
allow django to instantiate an instance of the class and call
authenticate on it.

Cheers

Tom

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User authentication with either username or email.

[shashank sandela]

Hi,

I created a backends.py in my project folder.

backends.py ::

*from django.conf import settings*
*from django.contrib.auth.models import User*
*
*
*class EmailOrUsernameModelBackend(object):*
*def authenticate(self, username=None, password=None):*
*if '@' in username:*
*kwargs = {'email': username}*
*else:*
*kwargs = {'username': username}*
*try:*
*user = User.objects.get(**kwargs)*
*if user.check_password(password):*
*return user*
*except User.DoesNotExist:*
*return None*
*
*
*def get_user(self, user_id):*
*try:*
*return User.objects.get(pk=user_id)*
*except User.DoesNotExist:*
*return None*
*
*
And in the views.py,

*from django.contrib import auth*
*from django.contrib.auth.models import User*
*from tangle.backends import EmailOrUsernameModelBackend*
*
*
*def authentication(request):*
*username = request.POST.get('username', '')*
*password = request.POST.get('password', '')*
*user = authenticate(username=username, password=password)*
*if user is not None:*
*auth.login(request, user)*
*return HttpResponseRedirect('/loggedin/')*
*else:*
*return HttpResponseRedirect('/invalid_login')*
*
*
Settings.py

*AUTHENTICATION_BACKENDS = (*
*'backends.EmailOrUsernameModelBackend',*
*'django.contrib.auth.backends.ModelBackend'*
*)*
*
*
Now when I login using either username or email it shows an error "global 
name 'authenticate' is not defined"

So, I used 
*user = EmailOrUsernameModelBackend.authenticate(username=username, 
password=password)*
*
*
It shows

TypeError at /authentication/

unbound method authenticate() must be called with EmailOrUsernameModelBackend 
instance as first argument (got nothing instead)

Can anyone help me out in solving the issue?

Thanks.

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