如何修复'TypeError:__init __()得到了意外的关键字参数'sender'

时间:2019-08-13 01:58:03

标签: python django django-rest-framework serializer

我正在尝试使用django-rest-framework序列化器ModelSerializer类创建django模型实例。这是我的序列化器代码:

class MessageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Message
        fields = ['sender', 'chat_room', 'content', 'sending_date']

这是我尝试使用其创建模型实例时的观点:

class SendMessage(APIView):
authentication_classes = [authentication.TokenAuthentication]
permission_classes = [permissions.IsAuthenticated]

def post(self, request):
    try:
        message_type = request.data['message_type']

        if message_type == ('text' or 'image' or 'audio'):

            if message_type == 'text':

                message_serializer = MessageSerializer(sender=request.user, chat_room=ChatRoom.objects.get(
                    id=request.data['chat_room_id']), content=MessageContent(text=request.data['text']))
                message = Message(message_serializer.data)

            elif message_type == 'image':
                message = MessageSerializer(sender=request.user.id, chat_room=request.data['chat_room_id'],
                                            content=MessageContent(image=request.FILES['image']))

            elif message_type == 'audio':
                message = MessageSerializer(sender=request.user.id, chat_room=request.data['chat_room_id'],
                                            content=MessageContent(image=request.FILES['image']))

            if message.chat_room.users.all().filter(id=request.user.id).exists():
                message.save()

                if message_type == 'image':
                    resize_photo(message.content.image, MessageContent.image_width, MessageContent.image_height)

                if message_type == 'audio':
                    if (not message.content.name.lower().endswith('mp4')) and os.get_size(message.content) > 25000:
                        message.delete()
                        raise FileSourceError

                message.save()
                return Response(status=status.HTTP_201_CREATED)
            else:
                return Response(status=status.HTTP_401_UNAUTHORIZED)

        else:
            return Response(status=status.HTTP_400_BAD_REQUEST)

    except KeyError or FileSourceError:
        return Response(status=status.HTTP_400_BAD_REQUEST)

这是我的消息模型:

class Message(models.Model):
    sender = models.ForeignKey(User, related_name='sender', on_delete=models.CASCADE)

    chat_room = models.ForeignKey(ChatRoom, related_name='chat_room', on_delete=models.CASCADE)

    content = models.OneToOneField(MessageContent, on_delete=models.CASCADE)

    is_read_by = models.ManyToManyField(User, related_name="is_read_by")

    sending_date = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ('sending_date',)

但是,当我运行这段代码时,我得到了

  

TypeError: init ()得到了意外的关键字参数'sender'

如果删除sender参数,我将得到

  

TypeError: init ()获得了意外的关键字参数'chat_room'

,依此类推。我检查了我的ModelSerializer是否使用

做正确的序列化器字段

print(repr(MessageSerializer()))

在django python外壳中,我得到了

MessageSerializer():
    sender = PrimaryKeyRelatedField(queryset=User.objects.all())
    chat_room = PrimaryKeyRelatedField(queryset=ChatRoom.objects.all())
    content = PrimaryKeyRelatedField(queryset=MessageContent.objects.all(), validators=[<UniqueValidator(queryset=Message.objects.all())>])
    sending_date = DateTimeField(read_only=True)

,这意味着我的序列化器具有以下字段(发件人,chat_room等) 为什么会出现此错误,以及如何解决?谢谢您的时间!

2 个答案:

答案 0 :(得分:1)

您应该将Message模型实例传递给MessageSerializer或包含dict中指定键的包含数据的fields

如果要传递dict,请将dict传递给data关键字。

message_dict = {'sender': request.user, 'chat_room': ChatRoom.objects.get(id=request.data['chat_room_id']), 'content': MessageContent(text=request.data['text'])}
message_serializer = MessageSerializer(data=message_dict)

if message_serializer.is_valid():
    message_serializer.save()

确保在create中实现了MessageSerializer方法。

答案 1 :(得分:0)

model.py 文件中,类属性之一发生更改

identification = models.IntegerField()

model.py 文件中,类属性之一发生更改

identification = models.IntegerField ()

不要在括号内留下任何内容,然后在控制台中使用以下命令进行检查

python manage.py check application_name