django serializer序列化

https://docs.djangoproject.com/zh-hans/2.0/topics/serialization/

import datetime

class DatetimeSerialize(DjangoJSONEncoder):
    def default(self, o):
        if isinstance(o,datetime.datetime):
            print(type(o),o)
            return o.strftime('%Y-%m-%d %H:%M:%S')
        return super().default(o)

def user_list(request):
    data = {"user": [], "total_count": 0}
    page = int(request.GET.get('page', 1))
    page_size = int(request.GET.get('page_size', 5))
    queryset = User.objects.filter(is_superuser=0)
    count = queryset.count()
    page = Page(page, count, per_page_count=page_size)
    if queryset.exists():
        queryset= queryset[page.start():page.end()]
    user_str = serialize("json",queryset,cls=DatetimeSerialize)
    data["total_count"] = count
    data["user"] = json.loads(user_list)
    data = InterfaceInfo().get_msg(data, "success", 200)
    return JsonResponse(data)
#user_str 是字符串