增加了公告发布成功的测试，以及公告分页的APIview

announcement/serializers.py

@@ -1,8 +1,24 @@
 # coding=utf-8
 from rest_framework import serializers
 
+from account.models import User
+from .models import Announcement
 
-class AnnouncementSerializer(serializers.Serializer):
+
+class CreateAnnouncementSerializer(serializers.Serializer):
     title = serializers.CharField(max_length=50)
     content = serializers.CharField(max_length=10000)
 
+
+class AnnouncementSerializer(serializers.ModelSerializer):
+
+    class UserSerializer(serializers.ModelSerializer):
+        class Meta:
+            model = User
+            fields = ["username"]
+
+    created_by = UserSerializer()
+
+    class Meta:
+        model = Announcement
+