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?
Answers:
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 = []
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'
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
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"
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?
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 = []
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'
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
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"