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

shorturl/views.py

@@ -3,7 +3,7 @@ import re
 from django.http import HttpResponseRedirect, HttpResponseNotFound, HttpResponseGone
 from django.utils import timezone
 from rest_framework.permissions import AllowAny, IsAuthenticated
-from rest_framework.views import APIView
+from adrf.views import APIView
 from rest_framework.response import Response
 from rest_framework import status
 from drf_yasg.utils import swagger_auto_schema
@@ -54,7 +54,7 @@ class ShortUrlShortenView(APIView):
         ),
         responses={200: success_response, 400: error_response, 409: error_response}
     )
-    def post(self, request):
+    async def post(self, request):
         url = request.data.get('url', '').strip()
         custom_code = request.data.get('custom_code', '').strip() or None
         expire_days = request.data.get('expire_days')
@@ -71,17 +71,17 @@ class ShortUrlShortenView(APIView):
                     {"code": 400, "message": "自定义短码仅允许字母、数字、连字符、下划线，长度3-20字符"},
                     status=status.HTTP_400_BAD_REQUEST
                 )
-            if ShortUrl.objects.filter(code=custom_code).exists():
+            if await ShortUrl.objects.filter(code=custom_code).aexists():
                 return Response(
                     {"code": 409, "message": "该短码已被使用，请更换"},
                     status=status.HTTP_409_CONFLICT
                 )
             code = custom_code
         else:
-            last = ShortUrl.objects.order_by('-id').first()
+            last = await ShortUrl.objects.order_by('-id').afirst()
             next_id = (last.id + 1) if last else 1
             code = encode_base62(next_id)
-            while ShortUrl.objects.filter(code=code).exists():
+            while await ShortUrl.objects.filter(code=code).aexists():
                 next_id += 1
                 code = encode_base62(next_id)
 
@@ -96,7 +96,7 @@ class ShortUrlShortenView(APIView):
 
         user = request.user if request.user.is_authenticated else None
 
-        short_url = ShortUrl.objects.create(
+        short_url = await ShortUrl.objects.acreate(
             code=code,
             original_url=url,
             custom_code=custom_code,
@@ -129,9 +129,9 @@ class ShortUrlInfoView(APIView):
         operation_description='通过短码查询短链接的详细信息',
         responses={200: success_response, 404: error_response}
     )
-    def get(self, request, code):
+    async def get(self, request, code):
         try:
-            short_url = ShortUrl.objects.get(code=code)
+            short_url = await ShortUrl.objects.aget(code=code)
         except ShortUrl.DoesNotExist:
             return Response(
                 {"code": 404, "message": "短链接不存在"},
@@ -157,16 +157,16 @@ class ShortUrlInfoView(APIView):
 class ShortUrlRedirectView(APIView):
     permission_classes = [AllowAny]
 
-    def get(self, request, code):
+    async def get(self, request, code):
         try:
-            short_url = ShortUrl.objects.get(code=code)
+            short_url = await ShortUrl.objects.aget(code=code)
         except ShortUrl.DoesNotExist:
             return HttpResponseNotFound('<h1>404 - 短链接不存在</h1>')
 
         if short_url.expire_at and short_url.expire_at < timezone.now():
             return HttpResponseGone('<h1>410 - 短链接已过期</h1>')
 
-        ShortUrl.objects.filter(pk=short_url.pk).update(click_count=short_url.click_count + 1)
+        await ShortUrl.objects.filter(pk=short_url.pk).aupdate(click_count=short_url.click_count + 1)
 
         return HttpResponseRedirect(short_url.original_url)
 
@@ -180,7 +180,7 @@ class ShortUrlListView(APIView):
         operation_description='分页返回当前登录用户创建的所有短链接',
         responses={200: success_response, 401: unauthorized_response}
     )
-    def get(self, request):
+    async def get(self, request):
         queryset = ShortUrl.objects.filter(creator=request.user).order_by('-created_at')
 
         page = int(request.GET.get('page', 1))
@@ -189,8 +189,8 @@ class ShortUrlListView(APIView):
 
         start = (page - 1) * page_size
         end = start + page_size
-        total = queryset.count()
-        results = queryset[start:end]
+        total = await queryset.acount()
+        results = [item async for item in queryset[start:end]]
 
         data = [{
             "code": item.code,