Question

这是我的view.py

@list_route(methods=["post"])
    def created_in_range(self, request):
        response = {}
        data = request.POST
        start = dateutil.parser.parse(data['start'])
        end = dateutil.parser.parse(data['end'])
        page_no = data['page_no']
        tweets = Tweet.get_created_in_range(start, end, int(page_no))
        serializer = TweetSerializer(tweets, many= True)
        response["data"] = serializer.data
        return Response(response, status= status.HTTP_200_OK)

这是models.py

的类方法

@classmethod
    def get_created_in_range(cls, start, end, page_no):
        """
        Returns all the tweets between start and end.
        """
        tweets = cls.objects.filter(created_at__level__gte = start, created_at__level__lt=end )
        paginator = Paginator(tweets, 5)
        return paginator.page(page_no)

这是我得到的错误

Internal Server Error: /api/twitter/created_in_range/
Traceback (most recent call last):
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/core/handlers/exception.py", line 35, in inner
    response = get_response(request)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/core/handlers/base.py", line 128, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/rest_framework/viewsets.py", line 95, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/rest_framework/views.py", line 494, in dispatch
    response = self.handle_exception(exc)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/rest_framework/views.py", line 454, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/rest_framework/views.py", line 491, in dispatch
    response = handler(request, *args, **kwargs)
  File "/home/kethan/Desktop/twitter_env/twitter_app/api/views.py", line 67, in created_in_range
    tweets = Tweet.get_created_in_range(start, end, int(page_no))
  File "/home/kethan/Desktop/twitter_env/twitter_app/api/models.py", line 143, in get_created_in_range
    tweets = cls.objects.filter(created_at__level__gte = start, created_at__level__lt=end )
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/query.py", line 836, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/query.py", line 854, in _filter_or_exclude
    clone.query.add_q(Q(*args, **kwargs))
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/sql/query.py", line 1253, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/sql/query.py", line 1277, in _add_q
    split_subq=split_subq,
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/sql/query.py", line 1215, in build_filter
    condition = self.build_lookup(lookups, col, value)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/sql/query.py", line 1069, in build_lookup
    lhs = self.try_transform(lhs, name)
  File "/home/kethan/Desktop/twitter_env/lib/python3.5/site-packages/django/db/models/sql/query.py", line 1115, in try_transform
    (name, lhs.output_field.__class__.__name__))
django.core.exceptions.FieldError: Unsupported lookup 'level' for DateTimeField or join on the field not permitted.
[25/Feb/2018 02:19:25] "POST /api/twitter/created_in_range/ HTTP/1.1" 500 19151

以上是服务器中的响应我不知道为什么日期时间字段有这么大的优惠

有人可以帮助我解决这个问题吗，我现在正在争取这个问题我不明白我哪里错了请帮助解决这个问题....

Answer 1

对于2个日期范围内的tweets，您只需要以下代码，并且不需要level。

tweets = cls.objects.filter(created_at__gte = start, created_at__lte=end )

推文创建日期应大于开始日期且小于结束日期。

DateTimeField不支持查找“级别”或不允许在该字段上加入

1 个答案: