fix

reaction/services.py

@@ -0,0 +1,19 @@
+from django.db.models import Count
+
+from reaction.models import Reaction, ReactionType
+
+# 并列票数时按 ReactionType 的定义顺序取靠前的那个，跟前端 REACTIONS 的顺序一致
+TYPE_ORDER = {t.value: index for index, t in enumerate(ReactionType)}
+
+
+def get_top_reactions(problem_ids):
+    """返回 {problem_id: {"type": ..., "count": ...}}，只包含有评价的题目。"""
+    if not problem_ids:
+        return {}
+    top = {}
+    rows = Reaction.objects.filter(problem_id__in=problem_ids).values("problem_id", "type").annotate(count=Count("id"))
+    for row in rows:
+        current = top.get(row["problem_id"])
+        if current is None or (-row["count"], TYPE_ORDER[row["type"]]) < (-current["count"], TYPE_ORDER[current["type"]]):
+            top[row["problem_id"]] = {"type": row["type"], "count": row["count"]}
+    return top

reaction/urls/admin.py

@@ -1,7 +0,0 @@
-from django.urls import path
-
-from ..views.admin import ReactionStatsAPI
-
-urlpatterns = [
-    path("reaction", ReactionStatsAPI.as_view()),
-]

reaction/views/admin.py

@@ -1,25 +0,0 @@
-from django.db.models import Count, F, Max, Q
-
-from account.decorators import super_admin_required
-from reaction.models import Reaction, ReactionType
-from utils.api import APIView
-
-
-class ReactionStatsAPI(APIView):
-    @super_admin_required
-    def get(self, request):
-        queryset = (
-            Reaction.objects.values(pid=F("problem___id"), title=F("problem__title"))
-            .annotate(users=Count("user", distinct=True))
-            .annotate(last_time=Max("create_time"))
-            .annotate(**{t.value: Count("id", filter=Q(type=t.value)) for t in ReactionType})
-            .order_by("-users")
-        )
-
-        problem_id = request.GET.get("problem")
-        if problem_id:
-            queryset = queryset.filter(problem___id__iexact=problem_id, problem__contest_id__isnull=True)
-
-        data = self.paginate_data(request, queryset)
-        data["results"] = list(data["results"])
-        return self.success(data)