小编Emm*_*ali的帖子

我在我的django-rest-api应用程序中使用PhoneNumberField

class User(AbstractBaseUser, PermissionsMixin):
    phone_number = PhoneNumberField(_('phone number'), unique=True)

我成功创建了超级用户与phonenumber和密码.但每次运行服务器我得到错误TypeError: __str__ returned non-string (type PhoneNumber)有人可以请帮助我

Stacktrace
TypeError: __str__ returned non-string (type PhoneNumber)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Emmanuel\Envs\myproject\lib\site-packages\django\core\handlers\exception.py", line 39, in inner
    response = get_response(request)
  File "C:\Users\Emmanuel\Envs\myproject\lib\site-packages\django\utils\deprecation.py", line 136, in __call__
    response = self.get_response(request)
  File "C:\Users\Emmanuel\Envs\myproject\lib\site-packages\django\core\handlers\exception.py", line 41, in inner
    response = response_for_exception(request, exc)
  File "C:\Users\Emmanuel\Envs\myproject\lib\site-packages\django\core\handlers\exception.py", line 86, in response_for_exception
    response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
  File "C:\Users\Emmanuel\Envs\myproject\lib\site-packages\django\core\handlers\exception.py", …

我正在监听片段上按下的后退按钮，如下所示

val callback = requireActivity().onBackPressedDispatcher.addCallback(this) {
    podcastViewModel.removePodcast();
    // THEN - continue navigating 
}

removePodcast();继续导航返回后，如何执行类似的任务。上面的代码拦截后退按钮按下但不继续

在我的rspec测试中,我被困了几天.然后我发现问题是使用符号而不是字符串

user_response = JSON.parse(response.body, symbilize_names: true)
expect(user_response[:email]).to eql(@user.email)

由于某些原因user_response[:email]返回以上代码总是失败nil

但是当我改变它以user_responce['email']通过测试

使用byebug进行调试以检查user_response的值

(byebyg) user_response
{"id"=>1, "email"=>"enola@bauch.ca", "created_at"=>"2017-08-30T14:22:43.597Z", "updated_at"=>"2017-08-30T14:22:43.597Z"}

在上面的例子中使用符号和字符串有什么区别？

我正在编写这个客户管理过滤器，仅需要过滤本周/本周的查询集。我怎样才能实现这个目标

class WeekFilter(admin.SimpleListFilter):
    title = _("Week")
    parameter_name = "week"

    def lookups(self, request, model_admin):
        return (
            ('1', 'This week'),
        )

    def queryset(self, request, queryset):
        if self.value() == '1':
            return queryset.filter() # HERE

我已经尝试过这个queryset.filter(created_at__week__gte=1,created-at__week__lte=7) 但它没有按预期工作

可能我知道**的以下用途

力量

x ** y # x power y equivalent to pow(x,y)

传递不定数量的参数

def sample(x, **other):
    print(x, other.keys)
sample(x=2,y=3,z=4) 

但我不明白它何时用作以下（在序列化器中）

def create(self, validated_data):
    return Comment(**validated_data)

有人可以告诉我那里发生了什么吗