feat: ADRF async views (phase1) + native async serializers (phase2) + async cache infra

user/views/invitation.py

@@ -1,4 +1,4 @@
-from rest_framework.views import APIView
+from adrf.views import APIView
 from rest_framework.response import Response
 from rest_framework.permissions import IsAuthenticated
 from user.models import Invitation, FUser
@@ -16,12 +16,12 @@ class InviteCodeAPIView(APIView):
         operation_description='获取当前用户的邀请码和邀请链接',
         responses={200: success_response, 401: unauthorized_response},
     )
-    def get(self, request):
+    async def get(self, request):
         user = request.user
         # Generate or get existing invite code
         invite_code = f"CY{str(user.id).zfill(6)}"
         # Ensure the invitation record exists
-        Invitation.objects.get_or_create(
+        await Invitation.objects.aget_or_create(
             inviter=user,
             invite_code=invite_code,
             defaults={'is_used': False}
@@ -41,11 +41,11 @@ class InviteStatsAPIView(APIView):
         operation_description='获取当前用户的邀请统计信息，包括已邀请人数、获得积分和待使用邀请数',
         responses={200: success_response, 401: unauthorized_response},
     )
-    def get(self, request):
+    async def get(self, request):
         user = request.user
-        used_count = Invitation.objects.filter(inviter=user, is_used=True).count()
+        used_count = await Invitation.objects.filter(inviter=user, is_used=True).acount()
         total_points = used_count * 500  # 500 points per invite
-        pending_count = Invitation.objects.filter(inviter=user, is_used=False).count()
+        pending_count = await Invitation.objects.filter(inviter=user, is_used=False).acount()
         return Response({
             'invited_count': used_count,
             'total_points': total_points,
@@ -62,11 +62,11 @@ class InviteRecordsAPIView(APIView):
         operation_description='获取当前用户的所有邀请记录列表',
         responses={200: success_response, 401: unauthorized_response},
     )
-    def get(self, request):
+    async def get(self, request):
         user = request.user
         records = Invitation.objects.filter(inviter=user).order_by('-created_at')
         data = []
-        for r in records:
+        async for r in records:
             data.append({
                 'id': r.id,
                 'invite_code': r.invite_code,