request.user.属性返回不需要的值

Question

为什么下面的print（owner）返回的值与我的模型中的值不同？ 是否可以获取下面定义的格式化用户名？ 我已经简化了我的def配置文件（请求）并取出了我的其他参数，直到我能找到获取格式化用户名的解决方案。

def profile(request):
    owner = User.objects.get (formattedusername=request.user.formattedusername)
    args = {'user':request.user.formattedusername}
    print (owner)
    return render(request, 'accounts/profile.html', args)
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
@3-alphas4numeric
[06/Nov/2017 16:18:11] "GET /account/profile/ HTTP/1.1" 200 1416

格式化用户名在我的模型中以 HCA\3-alphas4numeric 的形式存储在数据库中，它也由以下内容定义，它也是我所有其他模型中的键字段，并且没有办法使用整数作为键，因为它是一个预先存在的数据库：

class User(AbstractBaseUser, PermissionsMixin):

    email = models.EmailField(unique=True)
    username = models.CharField(max_length=7, unique=True)
    formattedusername = models.CharField(max_length=11, unique=True, primary_key = True)
    first_name = models.CharField(max_length=40)
    last_name = models.CharField(max_length=140)
    date_joined = models.DateTimeField(default=timezone.now)
    is_active = models.BooleanField(default=True)
    is_staff = models.BooleanField(default=False)
    facility = models.CharField(max_length=140)
    jobdescription = models.CharField(max_length=140)
    positiondescription = models.CharField(max_length=140)
    coid = models.CharField(max_length=5)
    streetaddress = models.CharField(max_length=140)

    USERNAME_FIELD = 'username'
    class Meta:
        app_label = 'accounts'
        db_table = "user"
    def save(self, *args, **kwargs):
        self.formattedusername = '{domain}{username}'.format(
            domain='HCA', username=self.username)
        super(User, self).save(*args, **kwargs);

Answer 1

当你做print(owner)时，你会打印出USERNAME_FIELD的值。这就是AbstractBaseUser.__str__的实施方式。

def get_username(self):
    "Return the identifying username for this User"
    return getattr(self, self.USERNAME_FIELD)
def __str__(self):
    return self.get_username()