Question

我对Django REST框架还很陌生，并且尝试为移动应用程序编写API。我面临一个问题，即PUT请求返回响应500（内部服务器错误）的事实之外，它可以正常工作（更新数据）。一些解决此问题的指导将不胜感激。

views.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)

models.py：

class Category(models.Model):
    name = models.CharField(max_length=25, blank=False)

    class Meta:
        ordering = ('id',)

serializers.py：

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

urls.py：

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

我试图寻找其他人可能遇到的类似问题，但是我无法为我的问题构建解决方案。

跟踪：

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

此问题已解决，方法是将视图替换为generic class-based views。

Django Rest Framework PUT请求返回500，但更新数据

1 个答案: