Custom user model backend

Hi guys,

I extended base user model with certain fields. My code is as follows:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from django.utils import timezone
from django.conf import settings
from django.contrib.auth.backends import ModelBackend
from django.core.exceptions import ImproperlyConfigured
from django.db.models import get_model

 

 

class CustomUserModelBackend(ModelBackend):
    def authenticate(self, username=None, password=None):
        try:
            user = self.user_class.objects.get(username=username)
            if user.login_duration is None or user.login_duration >= timezone.now():
                if user.check_password(password):
                    return user
            else:
                return None
        except self.user_class.DoesNotExist:
            return None

    def get_user(self, user_id):
        try:
            return self.user_class.objects.get(pk=user_id)
        except self.user_class.DoesNotExist:
            return None
    @property
    def user_class(self):
        if not hasattr(self, '_user_class'):
            self._user_class = get_model(*settings.CUSTOM_USER_MODEL.split('.', 2))
            if not self._user_class:
                raise ImproperlyConfigured('Could not get custom user model')
        return self._user_class

Everything works as it should but if i am logged in system logs me out after certain time even i am using application. Is there something i missed that controls how login persistence is handled?

Best,
Domagoj 

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