django.core.exceptions.FieldDoesNotExist: User has no field named 'username'

Question

I'm trying to customize django's AbstractUser. When I try to reset username to None, I get the following exception:

"django.core.exceptions.FieldDoesNotExist: User has no field named 'username'".

Here is my code:

class UserManager(BaseUserManager):
    use_in_migrations = True

    def _create_user(self, email, password, **extra_fields):
        if not email:
            raise ValueError("L'adresse e-mail donnée doit etre definie")
        email = self.normalize_email(email)
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_user(self, email, password, **extra_fields):
        extra_fields.setdefault("is_staff", False)
        extra_fields.setdefault("is_superuser", False)
        return self._create_user(email, password, **extra_fields)

    def create_superuser(self, email, password, **extra_fields):
        extra_fields.setdefault("is_staff", True)
        extra_fields.setdefault("is_superuser", True)

        if extra_fields.get("is_staff") is not True:
            raise ValueError("Superuser must have is_staff=True")
        if extra_fields.get("is_superuser") is not True:
            raise ValueError("Superuser must have is_superuser=True")
        return self._create_user(email, password, **extra_fields)


class User(AbstractUser):
    username = None
    email = models.EmailField('email adress', unique=True)
    telephone = models.CharField(max_length=20)
    REQUIRED_FIELDS = []

What can I do to solve this problem?

Please add the _full_ error traceback to your question. Also have you set `AUTH_USER_MODEL` in your settings? — Abdul Aziz Barkat, Jul 30 '21 at 17:04
I doubt you can "remove" the username field like that. It is a field coming from the `AbstractUser`. If you don't want to use it, maybe redefine it with a default and readonly? Or what exactly do you want to achieve? — Erik Kalkoken, Jul 30 '21 at 17:07

score 10 · Answer 1 · answered Feb 16 '22 at 09:27

10

This might have also caused if you are using django-allauth in your project.To fix this you need to define ACCOUNT_USER_MODEL_USERNAME_FIELD to None inside settings.py. Refer this question and allauth documentation for more information.

ACCOUNT_USER_MODEL_USERNAME_FIELD = None

answered Feb 16 '22 at 09:27

Sachin Das

319
3
8

1

If it gives `AssertionError` then use your username field instead of `None` eg. `ACCOUNT_USER_MODEL_USERNAME_FIELD = 'email'` – Ankit Tiwari Jun 22 '22 at 09:06

score 1 · Accepted Answer · answered Jul 30 '21 at 17:17

You haven't set a value for USERNAME_FIELD in your code. This must be set to a field that uniquely identifies a user instance. AbstractUser sets this to 'username' and hence you are getting the error. You can set this to 'email' to solve your problem:

class User(AbstractUser):
    username = None
    email = models.EmailField('email adress', unique=True)
    telephone = models.CharField(max_length=20)
    # set below value
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

score 1 · Answer 3 · edited Jan 02 '23 at 12:35

1

As mentioned in the documentation, you have to add in the settings file:

ACCOUNT_AUTHENTICATION_METHOD ="email"

But first you have to add to your model the following:

class User(AbstractUser):
    username = None
    email = models.EmailField('email adress', unique=True)
    telephone = models.CharField(max_length=20)
    REQUIRED_FIELDS = []
    USERNAME_FIELD = "email"

edited Jan 02 '23 at 12:35

Amira Bedhiafi

8,088
6
24
60

answered Dec 25 '22 at 15:47

Yahya mlaouhi

31
3

score 0 · Answer 4 · answered Jul 30 '21 at 17:20

What's the reason to set username as None?

User model must has a unique field like a username or email or phone_number to identificate user.

If you want to override user's model, you should to provide such unique field, mark it as username field and set django settings variable AUTH_USER_MODEL defining your customized model.

Something like this:


# model
class User(AbstractUser):
    username = models.CharField(max_length=32, unique=True)  # or something else
    ...

    USERNAME_FIELD = 'username'


# settings
AUTH_USER_MODEL = 'users.User'

django.core.exceptions.FieldDoesNotExist: User has no field named 'username'

4 Answers4