python - 访问 `.save()`后不能调用 `serializer.data`

Question

从 API 发布数据时显示错误

You cannot call `.save()` after accessing `serializer.data`.If you need to access data before committing to the database then inspect 'serializer.validated_data' instead. 

我写的代码是:

serializerdata = serializers.CreateSerializer(data=request.data)
if serializerdata.is_valid():
    user_id = serializerdata.data.get('user_id')
    if user_id==2:
        serializerdata.save(i_created_by=request.user)
        return JsonResponse({"message": "success"}) 
    else:
        return JsonResponse({"message": "user invalid"})    
else:
    return JsonResponse({"message": "error"})   

Answer 1

如错误所述，您无法访问 serializer.data 然后调用 save()。

您应该改为用户 validated_data:

user_id = serializerdata.validated_data.get('user_id')