python - Django 抽象用户模型未迁移

Question

所以我正在努力实现自定义用户模型，为此我遵循了教程“this”教程。

这些是模型:

class UserManager(BaseUserManager):
    """Define a model manager for User model with no username field."""

    use_in_migrations = True

    def _create_user(self, email, password, **extra_fields):
        """Create and save a User with the given email and password."""
        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):
        """Create and save a regular User with the given email and password."""
        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):
        """Create and save a SuperUser with the given email and password."""
        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):
    """User model."""

    username = None
    email = EmailField(_('email address'), unique=True)

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    objects = UserManager()

我现在尝试运行 python3 manage.py migrate 并收到此错误:

[wtreston] ~/gdrive/mysite2/ $ python3 manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, reviews, sessions, users
Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 164, in handle
    pre_migrate_apps = pre_migrate_state.apps
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/migrations/state.py", line 218, in apps
    return StateApps(self.real_apps, self.models)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/migrations/state.py", line 295, in __init__
    raise ValueError("\n".join(error.msg for error in errors))
ValueError: The field admin.LogEntry.user was declared with a lazy reference to 'users.user', but app 'users' doesn't provide model 'user'.
The field reviews.Answer.student was declared with a lazy reference to 'users.user', but app 'users' doesn't provide model 'user'.
The field reviews.ReviewBlock.teacher was declared with a lazy reference to 'users.user', but app 'users' doesn't provide model 'user'.
The field users.Student.user was declared with a lazy reference to 'users.user', but app 'users' doesn't provide model 'user'.
The field users.Teacher.user was declared with a lazy reference to 'users.user', but app 'users' doesn't provide model 'user'.

在我的settings.py中我有这一行AUTH_USER_MODEL = 'users.User'
。当我使用ForeignKeys引用AUTH_USER_MODEL时，我首先有from mysite import settings，然后有ForeignKey(settings.AUTH_USER_MODEL)

任何帮助都会有帮助!谢谢

Answer 1

您已为自定义用户模型继承了 AbstractUser，并且您正在为 UserManager 继承了 BaseUserManager通过继承 UserManager 修改您的管理器，如下所示:

class MyUserManager(UserManager):
    def create_user(self, email, password=None, **kwargs):
        # override this method

    def create_superuser(self, email, password, **kwargs):
        # override this method

首先清理迁移和数据库，然后应用此更改进行迁移。