fix: 2025년 행사가 retrieve되지 않던 문제 수정

Author: MU-Software

app/core/viewset/list_only_filter_viewset.py

@@ -0,0 +1,17 @@
+from django.db.models.query import QuerySet
+from rest_framework import viewsets
+
+
+class ListOnlyFilterMixin(viewsets.GenericViewSet):
+    """목록용 필터를 list action 에만 적용한다.
+
+    DRF 의 get_object() 는 filter_queryset() 을 거치므로, 목록 기본 스코프
+    (EventFilterMixin 의 "최신 이벤트" 등)가 단건 조회까지 좁혀 PK 가 유효한데도
+    404 가 난다. 단건 조회는 PK 로 지목하는 영구 링크이므로 스코프 밖이어도 접근 가능해야 한다.
+    """
+
+    def filter_queryset(self, queryset: QuerySet) -> QuerySet:
+        if self.action != "list":
+            return queryset
+
+        return super().filter_queryset(queryset)

app/event/presentation/test/api_test.py

@@ -89,6 +89,26 @@ def test_presentation_defaults_to_latest_event(api_client: APIClient):
     assert response_data[0]["id"] == str(new_prst.id)
 
 
+@pytest.mark.django_db
+def test_presentation_retrieve_ignores_latest_event_default(api_client: APIClient):
+    # Given: 지난 행사의 발표가 있고, 그보다 최신인 행사가 존재함.
+    organization = Organization.objects.create(name="Test Organization")
+    old_event = Event.objects.create(
+        organization=organization, name="PyCon Korea 2025", event_start_at=datetime(2025, 8, 1)
+    )
+    Event.objects.create(organization=organization, name="PyCon Korea 2026", event_start_at=datetime(2026, 8, 1))
+
+    old_type = PresentationType.objects.create(event=old_event, name="Talk")
+    old_prst = Presentation.objects.create(type=old_type, title="Old Presentation")
+
+    # When: event 파라미터 없이 지난 행사의 발표를 단건 조회
+    response = api_client.get(reverse("v1:presentation-detail", kwargs={"pk": old_prst.id}))
+
+    # Then: 목록 기본 스코프(최신 행사)와 무관하게 조회된다.
+    assert response.status_code == http.HTTPStatus.OK
+    assert response.json()["id"] == str(old_prst.id)
+
+
 def _make_public_file(name: str) -> PublicFile:
     return PublicFile.objects.create(file=f"public/{name}.png", mimetype="image/png", hash=name, size=0)
 

app/event/presentation/views.py

@@ -1,4 +1,5 @@
 from core.const.tag import OpenAPITag
+from core.viewset.list_only_filter_viewset import ListOnlyFilterMixin
 from django.db.models.query import QuerySet
 from django.shortcuts import get_object_or_404
 from django.utils.decorators import method_decorator
@@ -28,7 +29,12 @@ class PresentationCategoryViewSet(mixins.ListModelMixin, viewsets.GenericViewSet
 
 @method_decorator(name="list", decorator=extend_schema(tags=[OpenAPITag.EVENT_PRESENTATION]))
 @method_decorator(name="retrieve", decorator=extend_schema(tags=[OpenAPITag.EVENT_PRESENTATION]))
-class PresentationViewSet(mixins.ListModelMixin, mixins.RetrieveModelMixin, viewsets.GenericViewSet):
+class PresentationViewSet(
+    ListOnlyFilterMixin,
+    mixins.ListModelMixin,
+    mixins.RetrieveModelMixin,
+    viewsets.GenericViewSet,
+):
     queryset = Presentation.objects.get_all_nested_data()
     serializer_class = PresentationSerializer
     filterset_class = PresentationFilterSet

app/event/sponsor/views.py

@@ -1,4 +1,5 @@
 from core.const.tag import OpenAPITag
+from core.viewset.list_only_filter_viewset import ListOnlyFilterMixin
 from django.db import models
 from django.utils.decorators import method_decorator
 from drf_spectacular.utils import extend_schema
@@ -9,7 +10,7 @@
 
 
 @method_decorator(name="list", decorator=extend_schema(tags=[OpenAPITag.EVENT_SPONSOR]))
-class SponsorTierViewSet(mixins.ListModelMixin, viewsets.GenericViewSet):
+class SponsorTierViewSet(ListOnlyFilterMixin, mixins.ListModelMixin, viewsets.GenericViewSet):
     queryset = SponsorTier.objects.filter_active().prefetch_related(
         models.Prefetch(
             lookup="sponsors",