Django-Rest框架PUT请求返回500，但更新d

Question

我对Django-REST框架相当陌生，我已经尝试为我的移动应用程序编写一个API。我面临一个问题，即PUT请求除了返回响应500（内部服务器错误）之外，工作正常（更新数据）。如果能为解决这一问题提供一些指导，我们将不胜感激。在

视图.py：

@csrf_exempt
def category_instance(request, pk):
    """
    Returns Category instance
    """
    try:
        cat = Category.objects.get(pk=pk)
    except Category.DoesNotExist:
        return HttpResponse("Error: category does not exist", status=404)

    if request.method == 'GET':
        serializer = CategorySerializer(cat, many=False)
        return JsonResponse(serializer.data, safe=False)

    elif request.method == 'PUT':
        serializer = CategorySerializer(cat, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return JsonResponse(serializer.data, 200)
        return JsonResponse(serializer.errors, status=400)

    elif request.method == 'DELETE':
        cat.delete()
        return HttpResponse(status=204)

    else:
        return HttpResponse(status=400)

模型.py：

^{pr2}$

序列化程序.py：

class CategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = Category
        fields = ('id', 'name')

网址.py：

urlpatterns = [
    path('category/<int:pk>/', views.category_instance)
]

我试着寻找其他人可能遇到过的类似问题，但我无法找到解决问题的方法。在

---

回溯：

Internal Server Error: /category/1/
Traceback (most recent call last):
  File "C:\Users\vaida\Documents\Coding\android-tm-api\venv\lib\site-packages\django\core\handlers\exception.py", line 34,
 in inner
    response = get_response(request)
  File "C:\Users\vaida\Documents\Coding\android-tm-api\venv\lib\site-packages\django\core\handlers\base.py", line 126, in
_get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\vaida\Documents\Coding\android-tm-api\venv\lib\site-packages\django\core\handlers\base.py", line 124, in
_get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\vaida\Documents\Coding\android-tm-api\venv\lib\site-packages\django\views\decorators\csrf.py", line 54, i
n wrapped_view
    return view_func(*args, **kwargs)
  File "C:\Users\vaida\Documents\Coding\android-tm-api\android_tm_api\api\views.py", line 146, in category_instance
    serializer = CategorySerializer(cat, data=request.data)
AttributeError: 'WSGIRequest' object has no attribute 'data'

Answer 1

通过将视图替换为generic class-based views来解决该问题。在