为管理员增加强制显示最新排名的参数，用于比赛封榜后管理员查看最新排名。

contest/views.py

@@ -434,30 +434,41 @@ def contest_list_page(request, page=1):
                    "keyword": keyword, "join": join})
 
 
+def _get_rank(contest_id):
+    rank = ContestRank.objects.filter(contest_id=contest_id). \
+            select_related("user"). \
+            order_by("-total_ac_number", "total_time"). \
+            values("id", "user__id", "user__username", "user__real_name", "user__userprofile__student_id",
+                   "contest_id", "submission_info", "total_submission_number", "total_ac_number", "total_time")
+    return rank
+
+
 @check_user_contest_permission
 def contest_rank_page(request, contest_id):
     contest = Contest.objects.get(id=contest_id)
     contest_problems = ContestProblem.objects.filter(contest=contest, visible=True).order_by("sort_index")
 
-    r = get_cache_redis()
+    force_real_time_rank = False
-    cache_key = str(contest_id) + "_rank_cache"
+    if request.GET.get("force_real_time_rank") == "true" and (request.user.admin_type == SUPER_ADMIN or request.user == contest.created_by):
-    rank = r.get(cache_key)
+        rank = _get_rank(contest_id)
-
+        force_real_time_rank = True
-    if not rank:
-        rank = ContestRank.objects.filter(contest_id=contest_id). \
-            select_related("user"). \
-            order_by("-total_ac_number", "total_time"). \
-            values("id", "user__id", "user__username", "user__real_name", "contest_id", "submission_info",
-                   "total_submission_number", "total_ac_number", "total_time")
-        r.set(cache_key, json.dumps([dict(item) for item in rank]))
     else:
-        rank = json.loads(rank)
+        r = get_cache_redis()
+        cache_key = str(contest_id) + "_rank_cache"
+        rank = r.get(cache_key)
+
+        if not rank:
+            rank = _get_rank(contest_id)
+            r.set(cache_key, json.dumps([dict(item) for item in rank]))
+        else:
+            rank = json.loads(rank)
 
     return render(request, "oj/contest/contest_rank.html",
                   {"rank": rank, "contest": contest,
                    "contest_problems": contest_problems,
                    "auto_refresh": request.GET.get("auto_refresh", None) == "true",
-                   "show_real_name": request.GET.get("show_real_name", None) == "true", })
+                   "show_real_name": request.GET.get("show_real_name", None) == "true",
+                   "force_real_time_rank": force_real_time_rank})
 
 
 class ContestTimeAPIView(APIView):

template/src/oj/contest/contest_rank.html

@@ -23,13 +23,12 @@
 
         <div class="row">
             <div class="col-lg-12 table-responsive">
-                <h2 class="text-center">排名(
+                <h2 class="text-center">排名({% if contest.real_time_rank %}实时{% else %}已封榜{% endif %})
-                    {% if contest.real_time_rank %}
-                        实时
-                    {% else %}
-                        已封榜
-                    {% endif %})
                 </h2>
+                {% if force_real_time_rank %}
+                    <div class="alert alert-warning" role="alert">当前您使用了force_real_time_rank=true参数, 将强制显示实时结果。
+                        此提示仅管理员可见。</div>
+                {% endif %}
                 {% if rank %}
                     <table class="table table-bordered table-condensed text-center">
                         <thead>