在尝试使用泛型视图返回查询集时,我收到一个错误
TypeError:init()获得意外的关键字参数“many”
我无法理解这个错误的来源,因为它似乎是来自内部库。我不知道为什么这个错误起源于创建API工作得很好。
完成堆栈跟踪
System check identified 1 issue (0 silenced).
July 16, 2018 - 13:25:43
Django version 1.11.7, using settings 'BirthdayPostStash.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
<QuerySet [<Photos: 1>, <Photos: 2>, <Photos: 3>, <Photos: 4>, <Photos: 5>, <Photos: 6>, <Photos: 7>, <Photos: 8>, <Photos: 9>, <Photos: 10>, <Photos: 11>, <Photos: 12>]>
Internal Server Error: /photos/list-photo/
Traceback (most recent call last):
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
response = get_response(request)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
return view_func(*args, **kwargs)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/views.py", line 489, in dispatch
response = self.handle_exception(exc)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/views.py", line 449, in handle_exception
self.raise_uncaught_exception(exc)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/views.py", line 486, in dispatch
response = handler(request, *args, **kwargs)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/generics.py", line 201, in get
return self.list(request, *args, **kwargs)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/mixins.py", line 44, in list
serializer = self.get_serializer(page, many=True)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/generics.py", line 112, in get_serializer
return serializer_class(*args, **kwargs)
File "/home/t2b/env/bpstash/local/lib/python2.7/site-packages/rest_framework/fields.py", line 1774, in __init__
super(ModelField, self).__init__(**kwargs)
TypeError: __init__() got an unexpected keyword argument 'many'
[16/Jul/2018 13:25:45] "GET /photos/list-photo/ HTTP/1.1" 500 111194
型号.py
class Photos(models.Model):
owner = models.ForeignKey(User, related_name="photos_owner")
photo = models.ImageField(upload_to=get_image_path, blank=True)
participants = models.ManyToManyField(
Person,
related_name="photos_participants",
null=True,
blank=True)
查看次数.py
class ListPhoto(generics.ListAPIView):
permission_classes = (permissions.IsAuthenticated,)
serializer_class = PhotoPublicSerializer
model = Photos
def get_queryset(self):
return self.model.objects.all()
序列化器.py
class PhotoPublicSerializer(serializers.ModelField):
participants = PersonPublicSerializer(read_only=True)
class Meta:
model = Photos
fields = '__all__'
个人序列化程序.py
class PersonPublicSerializer(serializers.ModelSerializer):
class Meta:
model = Person
fields = '__all__'
4条答案
按热度按时间krugob8w1#
看起来像是打错了。
大脑疲劳时会做一些奇怪的事情。xD
3qpi33ja2#
当
serializer_class
被指向模型而不是ModelSerializer
时,我得到了这个问题snz8szmq3#
此问题由以下行引起:
participants = PersonPublicSerializer(many=True)
究其原因,可以看出:
PersonPublicSerializer
是从serializers.ModelField
扩展的class
serializers.ModelField
是从serializers.Field
扩展的class
Field
在初始化时接受以下参数之一(使用默认值):read_only=False
write_only=False
initial=empty
source=None
label=None
help_text=None
style=None
error_messages=None
validators=None
allow_null=False
ModelField
期望(即,必须具有)一个model_field
参数,并且还可以使用Field
的任何一个参数来调用。现在,如您所见,
ModelField
和Field
在其声明中都没有many
参数。因此,要么
PersonPublicSerializer
没有正确声明,应该实现一个many
参数,要么您是在依赖一个误解。来源:
Field
的源代码8yoxcaq74#
在我的例子中,我提供了错误的serializer_class。