Object does not exist

Using Django Mystery Errors
1

In some objects, Django gives me does not exist but they exist in the database.

the model:

class AudioRoomMember(models.Model):
    uid = models.CharField(max_length=100)
    room_name = models.CharField(max_length=200)
    slug = AutoSlugField(
        populate_from='room_name',
        unique_with='id',
        blank=True
    )
    in_session = models.BooleanField(default=False)

    def __str__(self):
        return f'User UID: {self.uid} - @{self.room_name}'

The view:

class RoomDetailView(APIView):

    serializer_class = AudioRoomMemberSerializer

    def get(self, request, uid, slug, format=None):
        room = AudioRoomMember.objects.get(uid=uid, slug=slug)
        serializer = AudioRoomMemberSerializer(room)
        return Response(serializer.data)

    def put(self, request, uid, slug, format=None):
        room = AudioRoomMember.objects.get(uid=uid, slug=slug)
        serializer = AudioRoomMemberSerializer(room, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def delete(self, request, uid, slug, format=None):
        room = AudioRoomMember.objects.get(uid=uid, slug=slug)
        room.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

and URL:

path(
        'rooms/<int:uid>/<slug:slug>',
        views.RoomDetailView.as_view(),
        name="room_detail"
    ),

The problem is when I send a PUT or DELETE request for the first object the request works, but when I send the same requests I get:


[11/Jul/2022 14:55:33] "GET /api/get_token/?channel=TEST HTTP/1.1" 200 160
[11/Jul/2022 14:55:34] "GET /api/rooms/ HTTP/1.1" 200 70
[11/Jul/2022 14:55:37] "POST /api/create_member/ HTTP/1.1" 201 71
[11/Jul/2022 14:55:39] "GET /api/get_token/?channel=TEST HTTP/1.1" 200 161
[11/Jul/2022 14:55:39] "GET /api/rooms/ HTTP/1.1" 200 142
[11/Jul/2022 14:55:42] "OPTIONS /api/rooms/377/test HTTP/1.1" 200 0
[11/Jul/2022 14:55:42] "OPTIONS /api/rooms/99/test HTTP/1.1" 200 0
[11/Jul/2022 14:55:42] "POST /api/create_member/ HTTP/1.1" 201 74
[11/Jul/2022 14:55:42] "PUT /api/rooms/99/test HTTP/1.1" 200 70
Internal Server Error: /api/rooms/377/test
Traceback (most recent call last):
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/home/sudoer/projects/rousseau/api/views.py", line 63, in put
    room = AudioRoomMember.objects.get(uid=uid, slug=slug)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/db/models/query.py", line 435, in get
    raise self.model.DoesNotExist(
api.models.AudioRoomMember.DoesNotExist: AudioRoomMember matching query does not exist.
[11/Jul/2022 14:55:42] "PUT /api/rooms/377/test HTTP/1.1" 500 104361
[11/Jul/2022 14:55:43] "OPTIONS /api/rooms/377/test HTTP/1.1" 200 0
Internal Server Error: /api/rooms/377/test
Traceback (most recent call last):
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/home/sudoer/projects/rousseau/api/views.py", line 63, in put
    room = AudioRoomMember.objects.get(uid=uid, slug=slug)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/sudoer/.local/share/virtualenvs/rousseau-rUJ26Ryu/lib/python3.10/site-packages/django/db/models/query.py", line 435, in get
    raise self.model.DoesNotExist(
api.models.AudioRoomMember.DoesNotExist: AudioRoomMember matching query does not exist.
[11/Jul/2022 14:55:43] "PUT /api/rooms/377/test HTTP/1.1" 500 104361
2

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3

Thank you for the guidance.
I hope the update explains my problem properly.

4

So to verify this, if you try these from within the Django shell:

AudioRoomMember.objects.get(uid=99, slug='test')
AudioRoomMember.objects.get(uid=377, slug='test')

They both work?

5

I figured that autoslug field adds ‘-1’ if the room_name field is the same name.

It’s now fixed.

Thank for the help.