<myObject>对象不可迭代，Django REST Fram

Question

我在向我的应用程序发布新产品时遇到以下错误

Traceback (most recent call last):
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/viewsets.py", line 116, in view
    return self.dispatch(request, *args, **kwargs)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/views.py", line 495, in dispatch
    response = self.handle_exception(exc)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/views.py", line 455, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/views.py", line 492, in dispatch
    response = handler(request, *args, **kwargs)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/mixins.py", line 20, in create
    serializer.is_valid(raise_exception=True)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 236, in is_valid
    self._validated_data = self.run_validation(self.initial_data)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 434, in run_validation
    value = self.to_internal_value(data)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 488, in to_internal_value
    validated_value = field.run_validation(primitive_value)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 623, in run_validation
    value = self.to_internal_value(data)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 662, in to_internal_value
    validated = self.child.run_validation(item)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 436, in run_validation
    self.run_validators(value)
  File "/mnt/c/Users/connect/Desktop/PIM/env/lib/python3.6/site-packages/rest_framework/serializers.py", line 465, in run_validators
    to_validate.update(value)
TypeError: 'Category' object is not iterable

我的序列化程序.py在

^{pr2}$

知道为什么会这样吗？在

我不明白“不可编辑”是什么意思，到底是什么代码导致了这个错误？在

我真的很感激你的帮助

这篇文章的格式如下

{

"id": 22,

"product_code": "dklj",

"name": "kdlj",

"quantity": 15,
"price": 15,
"categories": [ {
    "id": 5,
    "name": "Test category 3",
    "products": [],
    "categories": []
}]

}

Answer 1

这里： self.fields['categories'] = CategorySerializer(obj, many=True)

您告诉CategorySerializer准备一个类别列表，但您只传递了一个。在