django custom user model authentication code example

Example 1: import abstractuser

from django.contrib.auth.models import AbstractUser

Example 2: django authenticate with email

from django.contrib.auth import get_user_model
from django.contrib.auth.backends import ModelBackend

class EmailBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        UserModel = get_user_model()
        try:
            user = UserModel.objects.get(email=username)
        except UserModel.DoesNotExist:
            return None
        else:
            if user.check_password(password):
                return user
        return None

Example 3: Django Custom User Model

./manage.py shell
>>>
>>> from django.contrib.admin.models import LogEntry
>>> from django.contrib.contenttypes.models import ContentType
>>>
>>> auth_user = ContentType.objects.get(app_label='auth', model='user')
>>> accouts_user = ContentType.objects.get(app_label='Accounts', model='user')
>>>
>>> for le in LogEntry.objects.filter(content_type=auth_user):
...     le.content_type = accouts_user
...     le.save()
...

Example 4: django customize the user model

from django.contrib.auth.models import User

class Employee(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    department = models.CharField(max_length=100)

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