Django自定义身份验证模型注册表返回唯一的用户名错误

Question

我有自己的用户模型，名为user。我有一个用户注册表，返回以下错误：

duplicate key value violates unique constraint "users_user_username_06e46fe6_uniq"
DETAIL:  Key (username)=() already exists.

可能是用户模型被保存了两次吗？

这是我的表格：

class FighterSignUpForm(UserCreationForm):
class Meta(UserCreationForm.Meta):
model = User
fields = ('first_name', 'last_name','email','password1', 'password2',)
@transaction.atomic
def save(self):
user = super().save(commit=False)
user.is_fighter = True
user.is_active = False
user.save()
return user

这是我的观点：

class FighterSignUpView(CreateView):
model = User
form_class = FighterSignUpForm
template_name = 'registration/user_signup.html'
def get_context_data(self, **kwargs):
kwargs['user_type'] = 'example'
return super().get_context_data(**kwargs)
def form_valid(self, form):
user = form.save()

这是自定义用户模型：

class UserManager(BaseUserManager):
use_in_migrations = True
def _create_user(self, email, password, **extra_fields):
if not email:
raise ValueError('The given email must be set')
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=None, **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):
email = models.EmailField(_('Email'), unique=True)
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = []
is_type1 = models.BooleanField(default=False, verbose_name="type1")
is_type2 = models.BooleanField(default=False, verbose_name="type2")
is_type3 = models.BooleanField(default=False, verbose_name="type")
is_confirmed = models.BooleanField(default=False, verbose_name="Has Confirmed Email")
objects = UserManager()

我最近刚刚从SQlite3中移动了我的数据库，在运行前者时没有遇到任何问题。

Answer 1

与其从AbstractUser子类化，我认为从AbstractBaseUser子类化更好。因为AbstractUser有username字段，默认情况下是唯一的，而AbstractBaseUser只有password和last_login字段，它提供了User模型的核心实现。还有一个不利因素，比如AbstarctBaseUser没有is_staff、first_name、last_name、is_superuser字段，权限相关字段也缺失。所以，如果你这样使用它会更好：

class User(AbstractBaseUser, PermissionsMixin):
first_name = models.CharField(_('first name'), max_length=255, blank=True)
last_name = models.CharField(_('last name'), max_length=255, blank=True)
email = models.EmailField(_('email address'), blank=True, max_length=50)
is_staff = models.BooleanField(_('staff status'), default=False,
help_text=_('Designates whether the user'
' can log into this admin '
'site.'))
is_active = models.BooleanField(_('active'), default=True,
help_text=_('Designates whether '
'this user should be '
' treated as '
'active. Unselect this '
' instead of '
' deleting accounts.'))
objects = UserManager()
# rest of your fields
USERNAME_FIELD = 'email'
REQUIRED_FIELDS = ['email']
def get_short_name(self):
return self.first_name
class Meta:
verbose_name = _('user')
verbose_name_plural = _('users')

有关使用自定义用户模型的详细信息，请查看此处。此外，您还可以查看有关AbstractBaseUser和

AbstractUser或者您仍然可以使用AbstractUser，但需要覆盖username字段

class User(AbstractBaseUser, PermissionsMixin):
username = models.CharField(_('username'), max_length=255, blank=True, unique=False)
...
# rest of your fields