username saving as null in django custom model - django

Question

when i am sending post request to register new user from postman, username saves as blank/dash .
why username saving as blank i dont get it.
but when i add from django admin it saves correctly.
here is postman image
postman post request image
and here is the result
django result after sending post request
Custom Account Manager
class CustomAccountManager(BaseUserManager):
def create_superuser(self, email, username, password, **other_fields):
other_fields.setdefault('is_staff', True)
other_fields.setdefault('is_active', True)
other_fields.setdefault('is_admin', True)
other_fields.setdefault('is_superuser', True)
if other_fields.get('is_staff') is not True:
raise ValueError(
'Superuser must be assigned to is_staff=True.')
if other_fields.get('is_superuser') is not True:
raise ValueError(
'Superuser must be assigned to is_superuser=True.')
return self.create_user(email, username, password, **other_fields)
def create_user(self, email, username, password, **other_fields):
if not email:
raise ValueError(_('You must provide an email address'))
if not username:
raise ValueError(_('You must provide an username'))
if " " in username:
raise ValueError(_('Username should not contain space'))
email = self.normalize_email(email)
user = self.model(email=email, username=username, **other_fields)
user.set_password(password)
user.save()
return user
Custom User Model
class NewUser(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(_('email address'), unique=True, null=False, blank=False)
username = models.CharField(max_length=150, unique=True, null=True)
first_name = models.CharField(max_length=150, blank=True)
objects = CustomAccountManager()
# more
class Meta:
verbose_name = 'NewUser'
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = ['username']
def __str__(self):
return str(self.username)
model serializer
class RegisterNewUserSerializer(serializers.ModelSerializer):
class Meta:
model = NewUser
fields = ('email', 'password', 'username')
extra_kwargs={'password':{'write_only':True}}
def validate(self, data):
if hasattr(self, 'initial_data'):
unknown_keys = set(self.initial_data.keys()) - set(self.fields.keys())
if unknown_keys:
raise ValidationError("Got unknown fields: {}".format(unknown_keys))
return data
def validate_username(self, value):
if " " in value:
raise serializers.ValidationError("Username should not contain space")
def save(self):
newuser = NewUser(email = self.validated_data['email'],
username = self.validated_data['username']
)
password = self.validated_data['password']
newuser.set_password(password)
newuser.save()
return newuser
post request
class RegistrationView(APIView):
permission_classes = [ AllowAny ]
def post(self, request):
reg_serializer = RegisterNewUserSerializer(data = request.data)
print(request.data)
print(reg_serializer)
if reg_serializer.is_valid():
print('lololololololololololo')
reg_serializer.save()
return Response(data=request.data,status=status.HTTP_201_CREATED)
return Response(reg_serializer.errors, status=status.HTTP_400_BAD_REQUEST)

Answer 1

You validator should return the data, so:
def validate_username(self, value):
if " " in value:
raise serializers.ValidationError("Username should not contain space")
# ↓ return the value
return value
In Python a function call always returns something (unless an exception is raised). If no explicit return statement is triggered, None is returned.