python - DRF：无法通过管理界面发布或创建新对象
问题描述
当我尝试通过管理界面创建新对象时出现以下错误：
类型错误：% 的不支持的操作数类型：“配置不当”和“元组”
我有以下型号：
class CustomUser(AbstractUser):
def __str__(self):
return self.email
class Meta:
ordering = ('id',)
verbose_name = 'user'
class Address(models.Model):
"""Address contains information about location. Address can be own by any
kind of model."""
content_type = models.ForeignKey(
ContentType, on_delete=models.CASCADE, null=True
)
object_id = models.PositiveIntegerField(null=True)
owner = GenericForeignKey("content_type", "object_id")
CATEGORIES = Choices('billing', 'shipping')
category = models.CharField(choices=CATEGORIES, max_length=16)
address_1 = models.CharField("address line 1", max_length=128)
address_2 = models.CharField("address line 2", max_length=128, blank=True)
city = models.CharField(max_length=64)
state_province = models.CharField('state/province', max_length=128)
country = CountryField(blank_label='(select country)')
zip_code = models.CharField(max_length=10)
def __str__(self):
return (
f'{self.address_1}, {self.city}, {self.state_province}, '
f'{self.country.name}, {self.zip_code}'
)
class Meta:
ordering = ('id',)
class Company(Group):
"""An abstract base class that inherits Group."""
addresses = GenericRelation(Address)
owner = models.ForeignKey(User,
on_delete=models.CASCADE,
related_name='%(class)ss',
related_query_name='%(class)s')
logo = CloudinaryField('image',
default='your_logo_here',
null=True,
blank=True)
description = models.TextField('description', max_length=3000, blank=True)
facebook_url = models.URLField('facebook url', blank=True)
twitter_url = models.URLField('twitter url', blank=True)
instagram_url = models.URLField('instagram url', blank=True)
pinterest_url = models.URLField('pinterest url', blank=True)
portfolio_url = models.URLField('portfolio url', blank=True)
phone_number = PhoneNumberField('phone number', blank=True)
class Meta:
abstract = True
ordering = ('id',)
class Brand(Company):
"""A Brand can have multiple members."""
这些是我的序列化程序：
class CustomUserSerializer(HyperlinkedModelSerializer):
brands = HyperlinkedRelatedField(
many=True,
read_only=True,
view_name='brand-detail'
)
class Meta:
model = CustomUser
fields = (
'url',
'username',
'email',
'brands',
)
class AddressSerializer(HyperlinkedModelSerializer):
owner = GenericRelatedField({
Brand: HyperlinkedRelatedField(
queryset=Brand.objects.all(),
view_name='brand-detail',
)
})
class Meta:
model = Address
fields = (
'url',
'category',
'address_1',
'address_2',
'city',
'state_province',
'country',
'zip_code',
'owner',
)
class BrandSerializer(HyperlinkedModelSerializer):
addresses = HyperlinkedRelatedField(many=True,
read_only=True,
view_name='address-detail')
class Meta:
model = Brand
fields = (
'url',
'owner',
'logo',
'description',
'facebook_url',
'twitter_url',
'instagram_url',
'pinterest_url',
'portfolio_url',
'phone_number',
'addresses',
)
这就是我配置网址的方式：
router = DefaultRouter()
router.register('users', CustomUserViewSet)
router.register('addresses', AddressViewSet)
router.register('brands', BrandViewSet)
urlpatterns = [
path('', include(router.urls)),
path('auth/', include('rest_framework.urls', namespace='rest_framework')),
]
我可以访问http://localhost:8000/api/addresses/，我有以下表格：
问题是当我尝试 POST 创建一个新对象时。我收到了我描述的那个错误，这似乎是因为我没有正确传递所有者（实际上我不知道如何在这里传递一个对象，我应该使用 JSON 还是如何传递）。
问题：
我怎样才能解决这个错误，因为我也在尝试测试 POST 方法，并且当我意识到这不起作用时？
有没有办法
GenericForeignKey在该表单中包含 a 的字段？
这是我的回溯：
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/generic_relations/serializers.py" in to_internal_value
39. serializer = self.get_deserializer_for_data(data)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/generic_relations/serializers.py" in get_deserializer_for_data
75. 'Could not determine a valid serializer for value %r.' % value)
During handling of the above exception (Could not determine a valid serializer for value ''.), another exception occurred:
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/serializers.py" in to_internal_value
488. validated_value = field.run_validation(primitive_value)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/fields.py" in run_validation
536. value = self.to_internal_value(data)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/generic_relations/serializers.py" in to_internal_value
41. raise ValidationError(e)
During handling of the above exception (["Could not determine a valid serializer for value ''."]), another exception occurred:
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/fields.py" in get_error_detail
240. error_dict = exc_info.error_dict
During handling of the above exception ('ValidationError' object has no attribute 'error_dict'), another exception occurred:
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner
34. response = get_response(request)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
126. response = self.process_exception_by_middleware(e, request)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
124. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
54. return view_func(*args, **kwargs)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/viewsets.py" in view
116. return self.dispatch(request, *args, **kwargs)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/views.py" in dispatch
495. response = self.handle_exception(exc)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/views.py" in handle_exception
455. self.raise_uncaught_exception(exc)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/views.py" in dispatch
492. response = handler(request, *args, **kwargs)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/mixins.py" in create
20. serializer.is_valid(raise_exception=True)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/serializers.py" in is_valid
236. self._validated_data = self.run_validation(self.initial_data)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/serializers.py" in run_validation
434. value = self.to_internal_value(data)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/serializers.py" in to_internal_value
494. errors[field.field_name] = get_error_detail(exc)
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/fields.py" in get_error_detail
245. for error in exc_info.error_list]
File "/Users/user/.local/share/virtualenvs/na-ERB0uoVd/lib/python3.7/site-packages/rest_framework/fields.py" in <listcomp>
245. for error in exc_info.error_list]
Exception Type: TypeError at /api/addresses/
Exception Value: unsupported operand type(s) for %: 'ImproperlyConfigured' and 'tuple'
解决方案
如果添加 read_only=True 如下所示：
owner = GenericRelatedField({
Brand: HyperlinkedRelatedField(
queryset=Brand.objects.all(),
view_name='brand-detail',
)
}, read_only=True)
错误将消失。但是，您需要在同一个序列化程序中编写自己的 create() 方法，并序列化所有者，以说明您希望如何保存所有者。
推荐阅读
- r - R：遍历坐标（索引）列表以查找矩阵中的条目
- ubuntu - Raspberry Pi - Raspberry 操作系统 - Telegram-CLI
- android - Android：Providerinstaller 模块和更新安全提供程序
- php - 如何根据多个字段拆分/分组对象数组？使用 eval 来解决这个问题吗？
- php - 在 PHP 中动态比较这两个数组
- python - Pip：“跳过（some_package），因为它没有安装”
- ssms - PetaPoco ajax 400 对正确模型类型的错误请求
- ios - 如何调整 UINavigationBarAppearance 背景图像的大小
- javascript - 将数组中的数组中的条目推送到 JavaScript 数组中的另一个数组？
- python - 在 Python 中制作简单小部件时出现散景错误