Issue with Django 2.0 : 'WSGIRequest' object has no attribute 'session' - django

Question

I upgraded my Django version from 1.11.5 to 2.0 and I'm trying to solve different deprecated element.
However, even if my CSS/bootstrap style sheet doesn't work, I don't overcome to log into my Django software. I have this issue :
'WSGIRequest' object has no attribute 'session'
This is the entire Traceback :
Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/Authentification/Login/
Django Version: 2.0
Python Version: 3.6.2
Installed Applications:
['Institution',
'django.conf.urls',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'bootstrapform',
'django_countries',
'chartit',
'Configurations',
'Home',
'Authentication',
'Identity',
'rest_framework',
'Fiscal',
'bootstrap4']
Installed Middleware:
[]
Traceback:
File "/Users/valentinjungbluth/Desktop/DatasystemsCORE3.6/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/Users/valentinjungbluth/Desktop/DatasystemsCORE3.6/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/Users/valentinjungbluth/Desktop/DatasystemsCORE3.6/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/valentinjungbluth/Desktop/DatasystemsCORE3.6/lib/python3.6/site-packages/django/views/decorators/csrf.py" in wrapped_view
54. return view_func(*args, **kwargs)
File "/Users/valentinjungbluth/Desktop/Django/DatasystemsCORE/DatasystemsCore/DatasystemsCORE/Authentication/views.py" in Login
26. login(request, user)
File "/Users/valentinjungbluth/Desktop/DatasystemsCORE3.6/lib/python3.6/site-packages/django/contrib/auth/__init__.py" in login
130. if SESSION_KEY in request.session:
Exception Type: AttributeError at /Authentification/Login/
Exception Value: 'WSGIRequest' object has no attribute 'session'
In my Authentification app :
# views.py file
#-*- coding: utf-8 -*-
from django.contrib.auth import authenticate, login, logout
from .forms import ConnexionForm
from django.shortcuts import render, reverse, get_object_or_404, redirect
from django.http import HttpResponseRedirect, HttpResponse
from .models import LoggedUsers
from API_GED import Logger
import datetime
from django.views.decorators.csrf import csrf_exempt,csrf_protect
#csrf_exempt
def Login(request):
error = False
if request.method == "POST":
form = ConnexionForm(request.POST)
if form.is_valid():
username = form.cleaned_data["username"]
password = form.cleaned_data["password"]
user = authenticate(username=username, password=password) # Nous vérifions si les données sont correctes
if user: # Si l'objet renvoyé n'est pas None
login(request, user)
response = redirect('Homepage')
return response
else: # sinon une erreur sera affichée
error = True
else:
form = ConnexionForm()
return render(request, 'Authentication_Homepage.html', locals())
def Logout(request):
logout(request)
return redirect(reverse('Choice'))
def ConnectedUsers(request) :
logged_users = LoggedUsers.objects.all()
print (logged_users)
logged_users_number = LoggedUsers.objects.all().count()
context = {
"logged_users":logged_users,
"logged_users_number":logged_users_number,
}
return render(request, "Authentication_LoggedUsers.html", context)
An my models.py file :
from django.db import models
from django.contrib.auth.models import User
from django.contrib.auth.signals import user_logged_in, user_logged_out
# class UserProfile(models.Model):
# user = models.OneToOneField(User)
# avatar = models.ImageField(upload_to='/images/')
class LoggedUsers(models.Model):
user = models.ForeignKey(User, primary_key=True, on_delete=models.CASCADE)
def __str__(self):
return '{}{}{}'.format(self.user.first_name + " ", self.user.last_name + " (", self.user.username + ")")
def login_user(sender, request, user, **kwargs):
LoggedUsers(user=user).save()
def logout_user(sender, request, user, **kwargs):
try:
u = LoggedUsers.objects.get(user=user)
u.delete()
except LoggedUsers.DoesNotExist:
pass
user_logged_in.connect(login_user)
user_logged_out.connect(logout_user)
In my settings.py file, I have MIDDLEWARE_CLASSES :
MIDDLEWARE_CLASSES = [
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.middleware.gzip.GZipMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',
'DatasystemsCORE.middleware.OnlineNowMiddleware',
]
Any idea ?
EDIT :
I wrote MIDDLEWARE like this :
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'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',
]
It seems to work !

Answer 1

So the MIDDLEWARE_CLASSES changed to MIDDLEWARE https://docs.djangoproject.com/en/2.0/topics/http/middleware/#activating-middleware

Answer 2

MIDDLEWARE_CLASSES has been deprecated since Django 1.10 and was removed completely in version 2.0. That means you have no middleware at all.
You should use the MIDDLEWARE setting instead; note, that uses new-style middleware, you might need to upgrade your custom middleware class.