summary:
Login users can view the article details, and visitors can’t view the article details and report errors
Error codes are as follows:
Starting development server at http://127.0.0.1:8000/ Quit the server with CTRL-BREAK. --The above codes are basically to determine the identity of the visitor-- 1 The value of next_topic is: <QuerySet [<Topic: Topic object (2)>, <Topic: Topic object (3)>]> Internal Server Error: /v1/topics/qq66907360 Traceback (most recent call last): File "D:\Program Files (x86)\Python\Python310\lib\site-packages\django\core\handlers\exception.py", line 47, in inner response = get_response(request) File "D:\Program Files (x86)\Python\Python310\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "D:\Program Files (x86)\Python\Python310\lib\site-packages\django\views\generic\base.py", line 69, in view return self.dispatch(request, *args, **kwargs) File "D:\Program Files (x86)\Python\Python310\lib\site-packages\django\views\generic\base.py", line 101, in dispatch return handler(request, *args, **kwargs) File "D:\PycharmProjects\linuxTangblog\topic\views.py", line 151, in get res = self.make_topic_res(author,author_topic,is_self) File "D:\PycharmProjects\linuxTangblog\topic\views.py", line 29, in make_topic_res next_id = next_topic.id if next_topic else None AttributeError: 'QuerySet' object has no attribute 'id' [17/Dec/2021 15:02:20] "GET /v1/topics/qq66907360?t_id=1 HTTP/1.1" 500 79151
Troubleshooting process:
After traversing the ‘queryset’ object, I found that the traversed data is an object object object, and then I took the value with the object value,
The value of next_topic is: <QuerySet [<Topic: Topic object (2)>, <Topic: Topic object (3)>]> next_topic = Topic.objects.filter(id__gt=author_topic.id,author=author,limit='public') for i in next_topic: print(i.id)
Then I thought that the previous article and the next article only need one value, but obviously the queryset object has multiple values, which does not meet the expectation. Then I look at the code and find that the condition of first () or last () is not written
if is_self: #Next next_topic = Topic.objects.filter(id__gt=author_topic.id,author=author).first() #previous last_topic = Topic.objects.filter(id__lt=author_topic.id,author=author).last() else: next_topic = Topic.objects.filter(id__gt=author_topic.id,author=author,limit='public') last_topic = Topic.objects.filter(id__lt=author_topic.id,author=author,limit='public')
Solution:
Add the condition of first() or last()
if is_self: #Next next_topic = Topic.objects.filter(id__gt=author_topic.id,author=author).first() #previous last_topic = Topic.objects.filter(id__lt=author_topic.id,author=author).last() else: next_topic = Topic.objects.filter(id__gt=author_topic.id,author=author,limit='public').first() last_topic = Topic.objects.filter(id__lt=author_topic.id,author=author,limit='public').last()