[Django]-How to check whether the user is anonymous or not in Django?

An Alternative to

if user.is_anonymous():
    # user is anon user

is by testing to see what the id of the user object is:

if user.id == None:
    # user is anon user
else:
    # user is a real user

see https://docs.djangoproject.com/en/dev/ref/contrib/auth/#anonymous-users

You should check the value of request.user.is_authenticated. It will return True for a User instance and False for an AnonymousUser instance.

One answer suggests using is_anonymous but the django.contrib.auth documentation says “you should prefer using is_authenticated to is_anonymous”.

I know I’m doing a bit of grave digging here, but a Google search brought me to this page.

If your view def requires that the user is logged in, you can implement the @login_required decorator:

from django.contrib.auth.decorators import login_required

@login_required
def my_view(request):
    …

I had a similar issue except this was on a page that the login_redirect_url was sent to. I had to put in the template:

{% if user.is_authenticated %}
    Welcome Back, {{ username }}
{% endif %}

In Django rest framework it’s good idea to use permission classes to check if user is authenticated. This will apply to whole viewSet. In the simpliest form it could look like this:

from rest_framework.permissions import IsAuthenticated
...
class SomeViewSet(viewsets.GenericViewSet):
    permission_classes = [IsAuthenticated]

You should use request.user.is_authenticated as it is the preferred solution over the request.user.is_anonymous (the accepted answer)

You can use is_authenticated and is_anonymous with HttpRequest.user and get_user(request) to check if the user is anonymous or not in Django Views as shown below. *The doc recommends is_authenticated instead of is_anonymous:

# "views.py"

from django.shortcuts import render, 
from django.contrib.auth import get_user

def test(request):
    print(request.user.is_authenticated) # True or False
    print(request.user.is_anonymous) # True or False
    print(get_user(request).is_authenticated) # True or False
    print(get_user(request).is_anonymous) # True or False
    return render(request, 'index.html')

And, you can check if the user is anonymous or not in Django Templates as shown below:

{% "index.html" %}

{{ user.is_authenticated }} {% True or False %}
{{ user.is_anonymous }} {% True or False %}