diff --git a/announcement/views.py b/announcement/views.py
index 8059b90..767b206 100644
--- a/announcement/views.py
+++ b/announcement/views.py
@@ -36,7 +36,7 @@ class AnnouncementAdminAPIView(APIView):
                 if request.user.admin_type == SUPER_ADMIN:
                     groups = Group.objects.filter(id__in=data["groups"])
                 else:
-                    groups = Group.objects.filter(id__in=data["groups"], admin=request.user)
+                    groups = Group.objects.filter(id__in=data["groups"], created_by=request.user)
                 if not groups.count():
                     return error_response(u"至少选择一个小组")
             else:
@@ -68,7 +68,7 @@ class AnnouncementAdminAPIView(APIView):
                 if request.user.admin_type == SUPER_ADMIN:
                     announcement = Announcement.objects.get(id=data["id"])
                 else:
-                    announcement = Announcement.objects.get(id=data["id"], admin=request.user)
+                    announcement = Announcement.objects.get(id=data["id"], created_by=request.user)
             except Announcement.DoesNotExist:
                 return error_response(u"公告不存在")
             groups = []
@@ -76,7 +76,7 @@ class AnnouncementAdminAPIView(APIView):
                 if request.user.admin_type == SUPER_ADMIN:
                     groups = Group.objects.filter(id__in=data["groups"])
                 else:
-                    groups = Group.objects.filter(id__in=data["groups"], admin=request.user)
+                    groups = Group.objects.filter(id__in=data["groups"], created_by=request.user)
                 if not groups.count():
                     return error_response(u"至少选择一个小组")
             announcement.title = data["title"]
@@ -101,7 +101,7 @@ class AnnouncementAdminAPIView(APIView):
         if request.user.admin_type == SUPER_ADMIN:
             announcement = Announcement.objects.all().order_by("-last_update_time")
         else:
-            announcement = Announcement.objects.filter(admin=request.user)
+            announcement = Announcement.objects.filter(created_by=request.user)
         visible = request.GET.get("visible", None)
         if visible:
             announcement = announcement.filter(visible=(visible == "true"))