PUT请求没有更新数据- django

Question

我使用邮差来获取我的请求。我的GET和POST似乎工作得很好。只有当我用PUT去更新数据时，我才会遇到问题。实际上，Postman将数据发送回来，就好像对象正在更新一样，但是当我通过GET去检查时，它的数据与之前相同。我已经尝试将hive数据添加到序列化器中。，但是它告诉我添加了太多的参数。

models.py

class Inspection(models.Model):
hive = models.ForeignKey(Hive, on_delete=models.CASCADE)
user = models.ForeignKey(User,on_delete=models.CASCADE)
eggs = models.IntegerField()
larvae = models.IntegerField()
sealed_brood = models.IntegerField()
covered_bees = models.IntegerField()
nectar_honey = models.IntegerField()
pollen = models.IntegerField()
pest_spotted = models.CharField(max_length=200)
pest_action = models.CharField(max_length=200)
notes_concerns = models.CharField(max_length=300)

serializers.py

class InspectionSerializer(serializers.ModelSerializer):
class Meta:
model = Inspection
fields = ['id', 'eggs', 'larvae', 'sealed_brood', 'covered_bees', 'nectar_honey', 'nectar_honey', 'pollen', 'pest_spotted', 'pest_action', 'notes_concerns','user_id','hive','hive_id']
depth = 1
hive_id = serializers.IntegerField(write_only=True)

Views.py

@api_view(['GET', 'POST','PUT'])
@permission_classes([IsAuthenticated])
def inspection_details(request, pk):
hive = get_object_or_404(Hive, pk=pk)
inspection = Inspection.objects.filter(hive_id = hive.id, user=request.user)
if request.method == "GET":
serializer = InspectionSerializer(inspection, many=True)
return Response(serializer.data, status=status.HTTP_200_OK)

elif request.method == 'POST':
serializer = InspectionSerializer(data=request.data)
if serializer.is_valid(raise_exception=True):
serializer.save(user=request.user)
return Response(serializer.data,status.HTTP_200_OK)


elif request.method == 'PUT':
serializer = InspectionSerializer(hive, data=request.data)
if serializer.is_valid(raise_exception=True):
serializer.save(user=request.user)
return Response(serializer.data, status=status.HTTP_200_OK)

Answer 1

我认为实例变量不正确，应该是inspection而不是hive。

@api_view(['GET', 'POST', 'PUT'])
@permission_classes([IsAuthenticated])
def inspection_details(request, pk):
hive = get_object_or_404(Hive, pk=pk)
inspection = Inspection.objects.filter(hive_id = hive.id, user=request.user)
...
elif request.method == 'PUT':
serializer = InspectionSerializer(inspection, data=request.data)   # here
if serializer.is_valid(raise_exception=True):
serializer.save(user=request.user)
return Response(serializer.data, status=status.HTTP_200_OK)

Answer 2

首先不要对is_valid使用if子句。无论如何都会引发异常，因此不需要。

接下来你需要更新你的序列化器，而不是保存它。

elif request.method == 'PUT':
serializer = InspectionSerializer(hive, data=request.data)
serializer.is_valid(raise_exception=True)
serializer.update(object_to_update,serializer.validated_data)
# if you want to return updated serialized data :
updated_serializer = InspectionSerializer(object_to_update)
return Response(updated_serializer.data, status=status.HTTP_200_OK)