Use DB field instead of cache for contest summary

judge/admin/contest.py

@@ -24,6 +24,7 @@ from judge.widgets import (
     AdminSelect2Widget,
     HeavyPreviewAdminPageDownWidget,
 )
+from judge.views.contests import recalculate_contest_summary_result
 
 
 class AdminHeavySelect2Widget(AdminHeavySelect2Widget):
@@ -518,3 +519,9 @@ class ContestsSummaryAdmin(admin.ModelAdmin):
     list_display = ("key",)
     search_fields = ("key", "contests__key")
     form = ContestsSummaryForm
+
+    def save_model(self, request, obj, form, change):
+        super(ContestsSummaryAdmin, self).save_model(request, obj, form, change)
+        obj.refresh_from_db()
+        obj.results = recalculate_contest_summary_result(obj)
+        obj.save()

judge/migrations/0174_contest_summary_result.py

@@ -0,0 +1,50 @@
+# Generated by Django 3.2.18 on 2023-11-24 05:45
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("judge", "0173_fulltext"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="contestssummary",
+            name="results",
+            field=models.JSONField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name="contest",
+            name="authors",
+            field=models.ManyToManyField(
+                help_text="These users will be able to edit the contest.",
+                related_name="_judge_contest_authors_+",
+                to="judge.Profile",
+                verbose_name="authors",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="contest",
+            name="curators",
+            field=models.ManyToManyField(
+                blank=True,
+                help_text="These users will be able to edit the contest, but will not be listed as authors.",
+                related_name="_judge_contest_curators_+",
+                to="judge.Profile",
+                verbose_name="curators",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="contest",
+            name="testers",
+            field=models.ManyToManyField(
+                blank=True,
+                help_text="These users will be able to view the contest, but not edit it.",
+                related_name="_judge_contest_testers_+",
+                to="judge.Profile",
+                verbose_name="testers",
+            ),
+        ),
+    ]

judge/models/contest.py

@@ -920,6 +920,7 @@ class ContestsSummary(models.Model):
         max_length=20,
         unique=True,
     )
+    results = models.JSONField(null=True, blank=True)
 
     class Meta:
         verbose_name = _("contests summary")

judge/views/contests.py

@@ -27,7 +27,6 @@ from django.db.models import (
     Value,
     When,
 )
-from django.db.models.signals import post_save, post_delete
 from django.dispatch import receiver
 from django.db.models.expressions import CombinedExpression
 from django.http import (
@@ -1422,7 +1421,7 @@ def update_contest_mode(request):
 
 ContestsSummaryData = namedtuple(
     "ContestsSummaryData",
-    "user points point_contests css_class",
+    "username first_name last_name points point_contests css_class",
 )
 
 
@@ -1437,64 +1436,48 @@ class ContestsSummaryView(DiggPaginatorMixin, ListView):
             raise Http404()
         return super().get(*args, **kwargs)
 
-    def _get_contests_and_ranking(self):
-        contests_summary = self.contests_summary
-        cache_key = "csv:" + contests_summary.key
-        result = cache.get(cache_key)
-        if result:
-            return result
-
-        scores_system = contests_summary.scores
-        contests = contests_summary.contests.all()
-        total_points = defaultdict(int)
-        result_per_contest = defaultdict(lambda: [(0, 0)] * len(contests))
-        user_css_class = {}
-
-        for i in range(len(contests)):
-            contest = contests[i]
-            users, problems = get_contest_ranking_list(self.request, contest)
-            for rank, user in users:
-                curr_score = 0
-                if rank - 1 < len(scores_system):
-                    curr_score = scores_system[rank - 1]
-                total_points[user.user] += curr_score
-                result_per_contest[user.user][i] = (curr_score, rank)
-                user_css_class[user.user] = user.css_class
-
-        sorted_total_points = [
-            ContestsSummaryData(
-                user=user,
-                points=total_points[user],
-                point_contests=result_per_contest[user],
-                css_class=user_css_class[user],
-            )
-            for user in total_points
-        ]
-
-        sorted_total_points.sort(key=lambda x: x.points, reverse=True)
-        total_rank = ranker(sorted_total_points)
-
-        result = {
-            "total_rank": list(total_rank),
-            "contests": contests,
-        }
-        cache.set(cache_key, result)
-        return result
-
     def get_queryset(self):
-        rank_and_contests = self._get_contests_and_ranking()
+        total_rank = self.contests_summary.results
-        total_rank = rank_and_contests["total_rank"]
-        self.contests = rank_and_contests["contests"]
         return total_rank
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["contests"] = self.contests
+        context["contests"] = self.contests_summary.contests.all()
         context["title"] = _("Contests")
         context["first_page_href"] = "."
         return context
 
 
-@receiver([post_save, post_delete], sender=ContestsSummary)
+def recalculate_contest_summary_result(contest_summary):
-def clear_cache(sender, instance, **kwargs):
+    scores_system = contest_summary.scores
-    cache.delete("csv:" + instance.key)
+    contests = contest_summary.contests.all()
+    total_points = defaultdict(int)
+    result_per_contest = defaultdict(lambda: [(0, 0)] * len(contests))
+    user_css_class = {}
+
+    for i in range(len(contests)):
+        contest = contests[i]
+        users, problems = get_contest_ranking_list(None, contest)
+        for rank, user in users:
+            curr_score = 0
+            if rank - 1 < len(scores_system):
+                curr_score = scores_system[rank - 1]
+            total_points[user.user] += curr_score
+            result_per_contest[user.user][i] = (curr_score, rank)
+            user_css_class[user.user] = user.css_class
+
+    sorted_total_points = [
+        ContestsSummaryData(
+            username=user.username,
+            first_name=user.first_name,
+            last_name=user.last_name,
+            points=total_points[user],
+            point_contests=result_per_contest[user],
+            css_class=user_css_class[user],
+        )
+        for user in total_points
+    ]
+
+    sorted_total_points.sort(key=lambda x: x.points, reverse=True)
+    total_rank = ranker(sorted_total_points)
+    return [(rank, item._asdict()) for rank, item in total_rank]

templates/contest/contests_summary.html

@@ -49,9 +49,10 @@
           </td>
           <td>
             <div>
-              <span class="username {{ item.css_class }} wrapline" href="{{url('user_page', item.user.username)}}" >{{item.user.username}}</span>
+              <a href="{{url('user_page', item.username)}}"> <span class="username {{ item.css_class }} wrapline">{{item.username}}</span></a>
             </div>
-            <div>{{item.user.first_name}}</div>
+            <div>{{item.first_name}}</div>
+            <div>{{item.last_name}}</div>
           </td>
           {% for point_contest, rank_contest in item.point_contests %}
             <td>