diff --git a/gvsds/apps/community/manager.py b/gvsds/apps/community/manager.py
new file mode 100644
index 00000000..cadafac6
--- /dev/null
+++ b/gvsds/apps/community/manager.py
@@ -0,0 +1,150 @@
+"""模块：Community 社区数据访问层
+
+官网社区（discuss.gvsds.com）的板块/分类/帖子/回复/点赞数据访问收敛在此，
+视图层不直接操作 ORM。所有方法遵循帕斯卡命名法。
+"""
+
+import uuid
+
+from django.db.models import Count, F
+
+from .models import (
+    CommunityBoard,
+    CommunityCategory,
+    CommunityLike,
+    CommunityPost,
+    CommunityReply,
+)
+
+
+class CommunityManager:
+    """社区管理器"""
+
+    # ========== 板块 / 分类 ==========
+
+    @staticmethod
+    def ListActiveBoards():
+        """启用板块列表"""
+        return list(CommunityBoard.objects.filter(BoardStatus=1))
+
+    @staticmethod
+    def CountPostsByBoards(BoardUUIDs):
+        """各板块的已发布帖子数 {板块bytes: 帖子数}（BoardUUIDs 为空返回 {}）"""
+        if not BoardUUIDs:
+            return {}
+        return {
+            BoardUUID: PostCount
+            for BoardUUID, PostCount in CommunityPost.objects.filter(
+                PostStatus=1, BoardUUID__in=BoardUUIDs,
+            ).values_list('BoardUUID').annotate(c=Count('PostUUID'))
+        }
+
+    @staticmethod
+    def ListActiveCategories():
+        """启用分类列表"""
+        return list(CommunityCategory.objects.filter(CategoryStatus=1))
+
+    @staticmethod
+    def GetBoard(BoardUUID):
+        """按 UUID 取板块（不存在返回 None）"""
+        return CommunityBoard.objects.filter(BoardUUID=BoardUUID).first()
+
+    @staticmethod
+    def GetActiveBoard(BoardUUID):
+        """按 UUID 取启用板块（不存在或已停用返回 None）"""
+        return CommunityBoard.objects.filter(BoardUUID=BoardUUID, BoardStatus=1).first()
+
+    @staticmethod
+    def GetCategory(CategoryUUID):
+        """按 UUID 取分类（UUID 为空返回 None）"""
+        if not CategoryUUID:
+            return None
+        return CommunityCategory.objects.filter(CategoryUUID=CategoryUUID).first()
+
+    # ========== 帖子 ==========
+
+    @staticmethod
+    def QueryPosts(Filters=None):
+        """已发布帖子查询集
+
+        Filters 为附加过滤条件（键为 ORM lookup、值为已转换好的 bytes/str），
+        由调用方按「参数存在才过滤」的语义构造；为空表示仅限已发布。
+        """
+        return CommunityPost.objects.filter(PostStatus=1, **(Filters or {}))
+
+    @staticmethod
+    def GetPost(PostUUID, OnlyPublished=False):
+        """按 UUID 取帖子（OnlyPublished=True 时排除已删除；不存在返回 None）"""
+        qs = CommunityPost.objects.filter(PostUUID=PostUUID)
+        if OnlyPublished:
+            qs = qs.filter(PostStatus=1)
+        return qs.first()
+
+    @staticmethod
+    def CreatePost(BoardUUID, Title, Content, AuthorUUID, AuthorName, CategoryUUID=None):
+        """发帖"""
+        return CommunityPost.objects.create(
+            PostUUID=uuid.uuid4().bytes,
+            BoardUUID=BoardUUID,
+            CategoryUUID=CategoryUUID,
+            Title=Title,
+            Content=Content,
+            AuthorUUID=AuthorUUID,
+            AuthorName=AuthorName,
+        )
+
+    @staticmethod
+    def IncreaseViewCount(PostUUID):
+        """浏览量 +1（DB 侧原子自增）"""
+        CommunityPost.objects.filter(PostUUID=PostUUID).update(ViewCount=F('ViewCount') + 1)
+
+    @staticmethod
+    def IncreaseReplyCount(PostUUID):
+        """回复数 +1（DB 侧原子自增）"""
+        CommunityPost.objects.filter(PostUUID=PostUUID).update(ReplyCount=F('ReplyCount') + 1)
+
+    # ========== 回复 ==========
+
+    @staticmethod
+    def ListReplies(PostUUID):
+        """帖子下未删除回复列表"""
+        return CommunityReply.objects.filter(PostUUID=PostUUID, ReplyStatus=1)
+
+    @staticmethod
+    def CreateReply(PostUUID, AuthorUUID, AuthorName, Content, ReplyToUUID=None):
+        """新增回复"""
+        return CommunityReply.objects.create(
+            ReplyUUID=uuid.uuid4().bytes,
+            PostUUID=PostUUID,
+            AuthorUUID=AuthorUUID,
+            AuthorName=AuthorName,
+            Content=Content,
+            ReplyToUUID=ReplyToUUID,
+        )
+
+    # ========== 点赞 ==========
+
+    @staticmethod
+    def HasLiked(PostUUID, AuthorUUID):
+        """判断用户是否已点赞该帖子"""
+        return CommunityLike.objects.filter(PostUUID=PostUUID, AuthorUUID=AuthorUUID).exists()
+
+    @staticmethod
+    def ToggleLike(PostUUID, AuthorUUID):
+        """切换点赞状态并同步帖子点赞数
+
+        Returns:
+            True 表示本次为点赞，False 表示本次为取消点赞
+        """
+        existing = CommunityLike.objects.filter(PostUUID=PostUUID, AuthorUUID=AuthorUUID).first()
+        if existing is not None:
+            existing.delete()
+            CommunityPost.objects.filter(PostUUID=PostUUID).update(LikeCount=F('LikeCount') - 1)
+            return False
+        CommunityLike.objects.create(
+            LikeUUID=uuid.uuid4().bytes,
+            PostUUID=PostUUID,
+            AuthorUUID=AuthorUUID,
+        )
+        CommunityPost.objects.filter(PostUUID=PostUUID).update(LikeCount=F('LikeCount') + 1)
+        return True
diff --git a/gvsds/apps/community/views.py b/gvsds/apps/community/views.py
index 5464fc45..50aa3c0d 100644
--- a/gvsds/apps/community/views.py
+++ b/gvsds/apps/community/views.py
@@ -9,22 +9,14 @@
     POST /API/Community/Like                — 点赞/取消（登录）
 """
 import datetime
-import uuid
 
-from django.db.models import Count, F
 from rest_framework.permissions import IsAuthenticated, AllowAny
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from gvsdsdk.model_utils import UUIDObj
 
-from .models import (
-    CommunityBoard,
-    CommunityCategory,
-    CommunityPost,
-    CommunityReply,
-    CommunityLike,
-)
+from .manager import CommunityManager
 
 
 def _ToBytes(value):
@@ -88,14 +80,11 @@ class CommunityBoardsView(APIView):
     permission_classes = [AllowAny]
 
     def get(self, request):
-        boards = list(CommunityBoard.objects.filter(BoardStatus=1))
-        post_counts = {
-            _ToBytes(b): c
-            for b, c in CommunityPost.objects.filter(
-                PostStatus=1, BoardUUID__in=[_ToBytes(x.BoardUUID) for x in boards],
-            ).values_list('BoardUUID').annotate(c=Count('PostUUID'))
-        } if boards else {}
-        categories = list(CommunityCategory.objects.filter(CategoryStatus=1))
+        boards = CommunityManager.ListActiveBoards()
+        post_counts = CommunityManager.CountPostsByBoards(
+            [_ToBytes(x.BoardUUID) for x in boards],
+        )
+        categories = CommunityManager.ListActiveCategories()
         cat_map = {}
         for cat in categories:
             cat_map.setdefault(_ToBytes(cat.BoardUUID), []).append({
@@ -126,13 +115,14 @@ class CommunityPostsView(APIView):
             page_size = min(50, max(1, int(request.query_params.get('PageSize') or 20)))
         except (TypeError, ValueError):
             page, page_size = 1, 20
-        qs = CommunityPost.objects.filter(PostStatus=1)
+        filters = {}
         if board_str:
-            qs = qs.filter(BoardUUID=_ToBytes(board_str))
+            filters['BoardUUID'] = _ToBytes(board_str)
         if category_str:
-            qs = qs.filter(CategoryUUID=_ToBytes(category_str))
+            filters['CategoryUUID'] = _ToBytes(category_str)
         if keyword:
-            qs = qs.filter(Title__icontains=keyword)
+            filters['Title__icontains'] = keyword
+        qs = CommunityManager.QueryPosts(filters)
         total = qs.count()
         rows = []
         for p in qs.order_by('-IsPinned', '-CreateTime')[(page - 1) * page_size: page * page_size]:
@@ -158,18 +148,17 @@ class CommunityPostDetailView(APIView):
     permission_classes = [AllowAny]
 
     def get(self, request, post_uuid):
-        post = CommunityPost.objects.filter(PostUUID=_ToBytes(post_uuid), PostStatus=1).first()
+        post = CommunityManager.GetPost(_ToBytes(post_uuid), OnlyPublished=True)
         if post is None:
             return Response({'code': 1, 'msg': '帖子不存在或已删除'}, status=404)
-        CommunityPost.objects.filter(PostUUID=post.PostUUID).update(ViewCount=F('ViewCount') + 1)
+        CommunityManager.IncreaseViewCount(post.PostUUID)
         post.ViewCount += 1
         liked = 0
         user_bytes = _UserBytes(request.user)
         if user_bytes:
-            liked = 1 if CommunityLike.objects.filter(
-                PostUUID=post.PostUUID, AuthorUUID=user_bytes).exists() else 0
+            liked = 1 if CommunityManager.HasLiked(post.PostUUID, user_bytes) else 0
         replies = []
-        for r in CommunityReply.objects.filter(PostUUID=post.PostUUID, ReplyStatus=1):
+        for r in CommunityManager.ListReplies(post.PostUUID):
             replies.append({
                 'ReplyUUID': UUIDObj(r.ReplyUUID).str,
                 'AuthorName': r.AuthorName,
@@ -178,9 +167,8 @@ class CommunityPostDetailView(APIView):
                 'ReplyToUUID': UUIDObj(r.ReplyToUUID).str if r.ReplyToUUID else '',
                 'CreateTime': _TimeStr(r.CreateTime),
             })
-        board = CommunityBoard.objects.filter(BoardUUID=post.BoardUUID).first()
-        category = CommunityCategory.objects.filter(CategoryUUID=post.CategoryUUID).first() \
-            if post.CategoryUUID else None
+        board = CommunityManager.GetBoard(post.BoardUUID)
+        category = CommunityManager.GetCategory(post.CategoryUUID)
         data = {
             'PostUUID': UUIDObj(post.PostUUID).str,
             'BoardUUID': UUIDObj(post.BoardUUID).str,
@@ -220,21 +208,20 @@ class CommunityPostCreateView(APIView):
             return Response({'code': 1, 'msg': '请填写标题'}, status=400)
         if not content:
             return Response({'code': 1, 'msg': '请填写内容'}, status=400)
-        board = CommunityBoard.objects.filter(BoardUUID=_ToBytes(board_str), BoardStatus=1).first()
+        board = CommunityManager.GetActiveBoard(_ToBytes(board_str))
         if board is None:
             return Response({'code': 1, 'msg': '板块不存在或已停用'}, status=400)
         category_bytes = None
         category_str = (request.data.get('CategoryUUID') or '').strip()
         if category_str:
             category_bytes = _ToBytes(category_str)
-        post = CommunityPost.objects.create(
-            PostUUID=uuid.uuid4().bytes,
+        post = CommunityManager.CreatePost(
             BoardUUID=_ToBytes(board_str),
-            CategoryUUID=category_bytes,
             Title=title,
             Content=content,
             AuthorUUID=user_bytes,
             AuthorName=_UserName(request.user),
+            CategoryUUID=category_bytes,
         )
         return Response({'code': 0, 'msg': '发布成功', 'data': {'PostUUID': UUIDObj(post.PostUUID).str}})
 
@@ -254,7 +241,7 @@ class CommunityReplyCreateView(APIView):
             return Response({'code': 1, 'msg': '缺少帖子 UUID'}, status=400)
         if not content:
             return Response({'code': 1, 'msg': '请填写回复内容'}, status=400)
-        post = CommunityPost.objects.filter(PostUUID=_ToBytes(post_str), PostStatus=1).first()
+        post = CommunityManager.GetPost(_ToBytes(post_str), OnlyPublished=True)
         if post is None:
             return Response({'code': 1, 'msg': '帖子不存在或已删除'}, status=404)
         if post.IsLocked:
@@ -263,15 +250,14 @@ class CommunityReplyCreateView(APIView):
         reply_to_str = (request.data.get('ReplyToUUID') or '').strip()
         if reply_to_str:
             reply_to_bytes = _ToBytes(reply_to_str)
-        CommunityReply.objects.create(
-            ReplyUUID=uuid.uuid4().bytes,
+        CommunityManager.CreateReply(
             PostUUID=post.PostUUID,
             AuthorUUID=user_bytes,
             AuthorName=_UserName(request.user),
             Content=content,
             ReplyToUUID=reply_to_bytes,
         )
-        CommunityPost.objects.filter(PostUUID=post.PostUUID).update(ReplyCount=F('ReplyCount') + 1)
+        CommunityManager.IncreaseReplyCount(post.PostUUID)
         return Response({'code': 0, 'msg': '回复成功'})
 
 
@@ -287,20 +273,10 @@ class CommunityLikeView(APIView):
         post_str = (request.data.get('PostUUID') or '').strip()
         if not post_str:
             return Response({'code': 1, 'msg': '缺少帖子 UUID'}, status=400)
-        post = CommunityPost.objects.filter(PostUUID=_ToBytes(post_str), PostStatus=1).first()
+        post = CommunityManager.GetPost(_ToBytes(post_str), OnlyPublished=True)
         if post is None:
             return Response({'code': 1, 'msg': '帖子不存在或已删除'}, status=404)
-        liked = CommunityLike.objects.filter(PostUUID=post.PostUUID, AuthorUUID=user_bytes).first()
-        if liked:
-            liked.delete()
-            CommunityPost.objects.filter(PostUUID=post.PostUUID).update(
-                LikeCount=F('LikeCount') - 1)
+        liked = CommunityManager.ToggleLike(post.PostUUID, user_bytes)
+        if not liked:
             return Response({'code': 0, 'msg': '已取消点赞', 'data': {'Liked': 0}})
-        CommunityLike.objects.create(
-            LikeUUID=uuid.uuid4().bytes,
-            PostUUID=post.PostUUID,
-            AuthorUUID=user_bytes,
-        )
-        CommunityPost.objects.filter(PostUUID=post.PostUUID).update(
-            LikeCount=F('LikeCount') + 1)
         return Response({'code': 0, 'msg': '点赞成功', 'data': {'Liked': 1}})
diff --git a/gvsds/apps/doc/manager.py b/gvsds/apps/doc/manager.py
index c8d6d628..d645b2ea 100644
--- a/gvsds/apps/doc/manager.py
+++ b/gvsds/apps/doc/manager.py
@@ -137,6 +137,26 @@ class DocManager:
         serie.delete()
         return True, None
 
+    # ========== 查询集（供视图 get_queryset 复用） ==========
+
+    @staticmethod
+    def QueryDocuments(Keyword='', DocSerieUUID=None):
+        """文档查询集——按标题模糊 / 所属系列过滤（空值表示不过滤）"""
+        qs = CommunityDocument.objects.all()
+        if Keyword:
+            qs = qs.filter(DocTitle__icontains=Keyword)
+        if DocSerieUUID:
+            qs = qs.filter(DocSerieUUID=UUIDObj(DocSerieUUID).bytes)
+        return qs
+
+    @staticmethod
+    def QuerySeries(Keyword=''):
+        """系列查询集——按名称模糊过滤"""
+        qs = CommunitySeries.objects.all()
+        if Keyword:
+            qs = qs.filter(DocSerieName__icontains=Keyword)
+        return qs
+
     # ========== 系列附加查询（供视图收敛裸 ORM） ==========
 
     @staticmethod
diff --git a/gvsds/apps/doc/views.py b/gvsds/apps/doc/views.py
index 58318487..b540b50f 100644
--- a/gvsds/apps/doc/views.py
+++ b/gvsds/apps/doc/views.py
@@ -23,16 +23,10 @@ class CommunityDocumentViewSet(viewsets.ModelViewSet):
     permission_classes = [IsAuthenticated]
 
     def get_queryset(self):
-        qs = CommunityDocument.objects.all()
-        keyword = self.request.query_params.get('keyword', '')
-        serie_uuid = self.request.query_params.get('DocSerieUUID', '')
-        if keyword:
-            qs = qs.filter(DocTitle__icontains=keyword)
-        if serie_uuid:
-            serie_bytes = UUIDObj(serie_uuid).bytes
-            if serie_bytes:
-                qs = qs.filter(DocSerieUUID=serie_bytes)
-        return qs
+        return DocManager.QueryDocuments(
+            Keyword=self.request.query_params.get('keyword', ''),
+            DocSerieUUID=self.request.query_params.get('DocSerieUUID', ''),
+        )
 
     def list(self, request, *args, **kwargs):
         qs = self.get_queryset()
@@ -128,11 +122,7 @@ class CommunitySeriesViewSet(viewsets.ModelViewSet):
     permission_classes = [IsAuthenticated]
 
     def get_queryset(self):
-        qs = CommunitySeries.objects.all()
-        keyword = self.request.query_params.get('keyword', '')
-        if keyword:
-            qs = qs.filter(DocSerieName__icontains=keyword)
-        return qs
+        return DocManager.QuerySeries(Keyword=self.request.query_params.get('keyword', ''))
 
     def list(self, request, *args, **kwargs):
         qs = self.get_queryset()
diff --git a/gvsds/apps/invite/manager.py b/gvsds/apps/invite/manager.py
new file mode 100644
index 00000000..2cec18ce
--- /dev/null
+++ b/gvsds/apps/invite/manager.py
@@ -0,0 +1,33 @@
+"""模块：Invite AI 面试官数据访问层
+
+AI 面试官对话记录的数据访问收敛在此，视图层不直接操作 ORM。
+所有方法遵循帕斯卡命名法。
+"""
+
+from .models import InviteConversation
+
+
+class InviteManager:
+    """AI 面试官对话管理器"""
+
+    @staticmethod
+    def QuerySet():
+        """基础查询集（供 DRF queryset 复用）"""
+        return InviteConversation.objects.all()
+
+    @staticmethod
+    def GetByInviteID(InviteID):
+        """按 InviteID 取对话（不存在返回 None）"""
+        try:
+            return InviteConversation.objects.get(InviteID=InviteID)
+        except InviteConversation.DoesNotExist:
+            return None
+
+    @staticmethod
+    def Create(InviteID, Messages, CreateTime):
+        """新建对话记录"""
+        return InviteConversation.objects.create(
+            InviteID=InviteID,
+            Messages=Messages,
+            CreateTime=CreateTime,
+        )
diff --git a/gvsds/apps/invite/views.py b/gvsds/apps/invite/views.py
index 279224e8..a4cd9557 100644
--- a/gvsds/apps/invite/views.py
+++ b/gvsds/apps/invite/views.py
@@ -12,7 +12,7 @@ from rest_framework.response import Response
 from rest_framework.permissions import IsAuthenticated, AllowAny
 from openai import OpenAI
 
-from .models import InviteConversation
+from .manager import InviteManager
 from .serializers import (
     InviteConversationSerializer,
     InitConversationSerializer,
@@ -73,7 +73,7 @@ def _parse_final_status(ai_reply):
 
 
 class InviteConversationViewSet(viewsets.ModelViewSet):
-    queryset = InviteConversation.objects.all()
+    queryset = InviteManager.QuerySet()
     serializer_class = InviteConversationSerializer
     permission_classes = [AllowAny]
 
@@ -83,21 +83,19 @@ class InviteConversationViewSet(viewsets.ModelViewSet):
         ser.IsValid(raise_exception=True)
         invite_id = ser.ValidatedData['InviteID']
 
-        try:
-            conv = InviteConversation.objects.get(InviteID=invite_id)
+        conv = InviteManager.GetByInviteID(invite_id)
+        if conv is not None:
             return Response({
                 'code': 0,
                 'msg': '对话已存在',
                 'data': InviteConversationSerializer(conv).data,
             })
-        except InviteConversation.DoesNotExist:
-            pass
 
         greeting = _call_ai([{"role": "user", "content": "你好，我准备好了，请开始面试。"}])
         messages = [
             {"role": "assistant", "content": greeting},
         ]
-        conv = InviteConversation.objects.create(
+        conv = InviteManager.Create(
             InviteID=invite_id,
             Messages=messages,
             CreateTime=time.time(),
@@ -115,9 +113,8 @@ class InviteConversationViewSet(viewsets.ModelViewSet):
         invite_id = ser.ValidatedData['InviteID']
         user_message = ser.ValidatedData['Message']
 
-        try:
-            conv = InviteConversation.objects.get(InviteID=invite_id)
-        except InviteConversation.DoesNotExist:
+        conv = InviteManager.GetByInviteID(invite_id)
+        if conv is None:
             return Response({'code': 1, 'msg': '对话不存在'}, status=404)
 
         if conv.FinalStatus is not None:
@@ -156,9 +153,8 @@ class InviteConversationViewSet(viewsets.ModelViewSet):
         if not invite_id:
             return Response({'code': 1, 'msg': '缺少invite_id'}, status=400)
 
-        try:
-            conv = InviteConversation.objects.get(InviteID=invite_id)
-        except InviteConversation.DoesNotExist:
+        conv = InviteManager.GetByInviteID(invite_id)
+        if conv is None:
             return Response({'code': 1, 'msg': '对话不存在'}, status=404)
 
         messages = conv.Messages or []
diff --git a/gvsds/apps/sve/manager.py b/gvsds/apps/sve/manager.py
new file mode 100644
index 00000000..09f24d4f
--- /dev/null
+++ b/gvsds/apps/sve/manager.py
@@ -0,0 +1,45 @@
+"""模块：SVE 安全漏洞百科数据访问层
+
+SveID 为 5 字节二进制主键，存量存在「16 字节补零」「UTF-8 文本字节」等历史形态，
+按候选顺序回退匹配的逻辑收敛在此，视图层不直接操作 ORM。所有方法遵循帕斯卡命名法。
+"""
+
+from .models import SVEBase
+
+
+class SveManager:
+    """漏洞百科管理器"""
+
+    @staticmethod
+    def QuerySet():
+        """基础查询集（供 DRF queryset 与列表筛选复用）"""
+        return SVEBase.objects.all()
+
+    @staticmethod
+    def GetByCandidates(Candidates):
+        """按候选主键依次匹配（规范 5 字节 → 旧补零 16 字节 → 旧 UTF-8 字节）
+
+        全部候选均不存在时返回 None。
+        """
+        for Candidate in Candidates:
+            try:
+                return SVEBase.objects.get(SveID=Candidate)
+            except SVEBase.DoesNotExist:
+                continue
+        return None
+
+    @staticmethod
+    def Upsert(SveID, Defaults, CreateDefaults=None):
+        """按 SveID 覆盖写入
+
+        CreateDefaults 仅在新建时写入（如 SveCreateTime），不覆盖存量值。
+
+        Returns:
+            (实例, 是否新建)
+        """
+        instance, created = SVEBase.objects.update_or_create(SveID=SveID, defaults=Defaults)
+        if created and CreateDefaults:
+            for Field, Value in CreateDefaults.items():
+                setattr(instance, Field, Value)
+            instance.save(update_fields=list(CreateDefaults))
+        return instance, created
diff --git a/gvsds/apps/sve/views.py b/gvsds/apps/sve/views.py
index 4aa0e0fc..4f72c5b1 100644
--- a/gvsds/apps/sve/views.py
+++ b/gvsds/apps/sve/views.py
@@ -15,7 +15,7 @@ from rest_framework.response import Response
 from rest_framework.permissions import AllowAny
 from django.db.models import Q
 
-from .models import SVEBase
+from .manager import SveManager
 from .serializers import SVESerializer, SVEListSerializer, SVEWriteSerializer
 
 
@@ -79,7 +79,7 @@ def _detail_data(sve):
 
 
 class SVEViewSet(viewsets.ModelViewSet):
-    queryset = SVEBase.objects.all()
+    queryset = SveManager.QuerySet()
     serializer_class = SVESerializer
     permission_classes = [AllowAny]
 
@@ -92,7 +92,7 @@ class SVEViewSet(viewsets.ModelViewSet):
         ser.IsValid(raise_exception=True)
         data = ser.ValidatedData
 
-        qs = SVEBase.objects.all()
+        qs = SveManager.QuerySet()
         Keyword = data.get('Keyword', '')
         if Keyword:
             qs = qs.filter(
@@ -165,13 +165,7 @@ class SVEViewSet(viewsets.ModelViewSet):
             SveID.encode('utf-8')[:16].ljust(16, b'\x00'),
             SveID.encode('utf-8'),
         )
-        sve = None
-        for candidate in candidates:
-            try:
-                sve = SVEBase.objects.get(SveID=candidate)
-                break
-            except SVEBase.DoesNotExist:
-                continue
+        sve = SveManager.GetByCandidates(candidates)
         if sve is None:
             return Response({'code': 1, 'msg': 'SVE不存在'}, status=404)
 
@@ -199,13 +193,11 @@ class SVEViewSet(viewsets.ModelViewSet):
             'SveLastModified': datetime.datetime.utcnow(),
         }
 
-        sve, created = SVEBase.objects.update_or_create(
-            SveID=sve_id_bytes,
-            defaults=defaults,
+        sve, created = SveManager.Upsert(
+            sve_id_bytes,
+            defaults,
+            CreateDefaults={'SveCreateTime': datetime.datetime.utcnow()},
         )
-        if created:
-            sve.SveCreateTime = datetime.datetime.utcnow()
-            sve.save(update_fields=['SveCreateTime'])
 
         return Response({
             'code': 0,