删除每个页面上单独查询公告的逻辑，改为使用 templatetag 实现。

contest/views.py

@@ -335,10 +335,7 @@ def contest_problems_list_page(request, contest_id):
                 item.state = 2
         else:
             item.state = 0
-    # 右侧的公告列表
-    announcements = Announcement.objects.filter(is_global=True, visible=True).order_by("-create_time")
     return render(request, "oj/contest/contest_problems_list.html", {"contest_problems": contest_problems,
-                                                                     "announcements": announcements,
                                                                      "contest": {"id": contest_id}})
 
 
@@ -378,14 +375,10 @@ def contest_list_page(request, page=1):
     except Exception:
         pass
 
-    # 右侧的公告列表
-    announcements = Announcement.objects.filter(is_global=True, visible=True).order_by("-create_time")
-
     return render(request, "oj/contest/contest_list.html",
                   {"contests": current_page, "page": int(page),
                    "previous_page": previous_page, "next_page": next_page,
-                   "keyword": keyword, "announcements": announcements,
+                   "keyword": keyword, "join": join})
-                   "join": join})
 
 
 def _cmp(x, y):

group/views.py

@@ -254,9 +254,6 @@ class JoinGroupRequestAdminAPIView(APIView, GroupAPIViewBase):
 
 @login_required
 def group_list_page(request, page=1):
-    # 右侧的公告列表
-    announcements = Announcement.objects.filter(is_global=True, visible=True).order_by("-create_time")
-
     groups = Group.objects.filter(visible=True, join_group_setting__lte=2)
     # 搜索的情况
     keyword = request.GET.get("keyword", None)
@@ -282,10 +279,10 @@ def group_list_page(request, page=1):
         pass
 
     return render(request, "oj/group/group_list.html", {
-        "groups": groups, "announcements": announcements,
+        "groups": groups,
         "contests": current_page, "page": int(page),
         "previous_page": previous_page, "next_page": next_page,
-        "keyword": keyword, "announcements": announcements,
+        "keyword": keyword
     })
 
 

problem/views.py

@@ -255,8 +255,6 @@ def problem_list_page(request, page=1):
     except Exception:
         pass
 
-    # 右侧的公告列表
-    announcements = Announcement.objects.filter(is_global=True, visible=True).order_by("-create_time")
     # 右侧标签列表 按照关联的题目的数量排序 排除题目数量为0的
     tags = ProblemTag.objects.annotate(problem_number=Count("problem")).filter(problem_number__gt=0).order_by("-problem_number")
 
@@ -264,4 +262,4 @@ def problem_list_page(request, page=1):
                   {"problems": current_page, "page": int(page),
                    "previous_page": previous_page, "next_page": next_page,
                    "keyword": keyword, "tag": tag_text,
-                   "announcements": announcements, "tags": tags})
+                   "tags": tags})

template/src/oj/announcement/_announcement_panel.html

@@ -1,3 +1,4 @@
+{% load announcement_list %}
 <div class="panel panel-info">
     <div class="panel-heading">
         <h3 class="panel-title">
@@ -5,8 +6,9 @@
             公告
         </h3></div>
     <div class="panel-body">
+    {% public_announcement_list as announcements %}
         {% if announcements %}
-            {% for item in announcements %}
+            {% for item in announcements%}
             <p>{{ forloop.counter }}.&nbsp;&nbsp;<a href="/announcement/{{ item.id }}/" target="_blank">{{ item.title }}</a>
             </p>
             {% endfor %}

template/src/oj/submission/my_submissions_list.html

@@ -3,7 +3,7 @@
 {% block body %}
 {% load submission %}
 <div class="container main">
-    <div class="col-md-9 col-lg-9">
+    <div class="col-md-12 col-lg-12">
         <table class="table table-striped">
             <thead>
             <tr>
@@ -92,8 +92,6 @@
         <p>你还没有提交记录!</p>
         {% endif %}
     </div>
-    <div class="col-md-3 col-lg-3">
+
-        {% include "oj/announcement/_announcement_panel.html" %}
-    </div>
 </div>
 {% endblock %}

utils/templatetags/announcement_list.py

@@ -0,0 +1,10 @@
+# coding=utf-8
+from django import template
+
+from announcement.models import Announcement
+
+def public_announcement_list():
+    return Announcement.objects.filter(is_global=True, visible=True).order_by("-create_time")
+
+register = template.Library()
+register.assignment_tag(public_announcement_list, name="public_announcement_list")