Clean up more sql queries

judge/views/blog.py

@@ -130,7 +130,6 @@ class TicketFeed(HomeFeedView):
                     )
                     .order_by("-id")
                     .prefetch_related("linked_item")
-                    .select_related("user__user")
                 )
             else:
                 return []
@@ -141,7 +140,6 @@ class TicketFeed(HomeFeedView):
                     Ticket.objects.order_by("-id")
                     .filter(is_open=True)
                     .prefetch_related("linked_item")
-                    .select_related("user__user")
                 )
                 return filter_visible_tickets(tickets, self.request.user, profile)
             else:
@@ -157,7 +155,7 @@ class TicketFeed(HomeFeedView):
 class CommentFeed(HomeFeedView):
     model = Comment
     context_object_name = "comments"
-    paginate_by = 15
+    paginate_by = 10
     feed_content_template_name = "comments/feed.html"
 
     def get_queryset(self):

judge/views/comment.py

@@ -438,22 +438,13 @@ class CommentedDetailView(TemplateResponseMixin, SingleObjectMixin, View):
     def _get_queryset(self, target_comment):
         if target_comment:
             queryset = target_comment.get_descendants(include_self=True)
-            queryset = (
-                queryset.select_related("author__user")
-                .filter(hidden=False)
-                .defer("author__about")
-            )
+            queryset = queryset.filter(hidden=False)
         else:
             queryset = self.object.comments
             queryset = queryset.filter(parent=None, hidden=False)
-            queryset = (
-                queryset.select_related("author__user")
-                .defer("author__about")
-                .filter(hidden=False)
-                .annotate(
-                    count_replies=Count("replies", distinct=True),
-                )[:DEFAULT_OFFSET]
-            )
+            queryset = queryset.filter(hidden=False).annotate(
+                count_replies=Count("replies", distinct=True),
+            )[:DEFAULT_OFFSET]
 
         if self.request.user.is_authenticated:
             profile = self.request.profile

judge/views/submission.py

@@ -469,6 +469,9 @@ class SubmissionsListBase(DiggPaginatorMixin, TitleMixin, ListView):
         if context["in_hidden_subtasks_contest"]:
             for submission in context["submissions"]:
                 self.modify_attrs(submission)
+        context[
+            "is_in_editable_contest"
+        ] = self.in_contest and self.contest.is_editable_by(self.request.user)
 
         return context
 
@@ -721,6 +724,11 @@ def single_submission(request, submission_id, show_problem=True):
         submission_related(Submission.objects.all()), id=int(submission_id)
     )
 
+    is_in_editable_contest = False
+    if authenticated and request.in_contest_mode:
+        contest = request.profile.current_contest.contest
+        is_in_editable_contest = contest.is_editable_by(request.user)
+
     if not submission.problem.is_accessible_by(request.user):
         raise Http404()
 
@@ -733,6 +741,7 @@ def single_submission(request, submission_id, show_problem=True):
             "problem_name": show_problem
             and submission.problem.translated_name(request.LANGUAGE_CODE),
             "profile": request.profile if authenticated else None,
+            "is_in_editable_contest": is_in_editable_contest,
         },
     )