n

backend/community/models.py

@@ -47,6 +47,13 @@ class Activity(models.Model):
             return self.banner.url
         return self.banner_url
 
+    @property
+    def current_signups(self):
+        """
+        当前有效报名人数
+        """
+        return self.signups.exclude(status='cancelled').count()
+
     def __str__(self):
         return self.title
 

backend/community/serializers.py

@@ -6,17 +6,13 @@ from .utils import get_current_wechat_user
 class ActivitySerializer(serializers.ModelSerializer):
     display_banner_url = serializers.ReadOnlyField()
     signup_form_config = serializers.SerializerMethodField()
-    current_signups = serializers.SerializerMethodField()
+    current_signups = serializers.ReadOnlyField()
     has_signed_up = serializers.SerializerMethodField()
     
     class Meta:
         model = Activity
         fields = '__all__'
 
-    def get_current_signups(self, obj):
-        # 统计非取消状态的报名人数
-        return obj.signups.exclude(status='cancelled').count()
-
     def get_has_signed_up(self, obj):
         request = self.context.get('request')
         if not request:

backend/community/views.py

@@ -21,6 +21,13 @@ class ActivityViewSet(viewsets.ReadOnlyModelViewSet):
     queryset = Activity.objects.filter(is_active=True).order_by('-created_at')
     serializer_class = ActivitySerializer
 
+    def retrieve(self, request, *args, **kwargs):
+        instance = self.get_object()
+        serializer = self.get_serializer(instance)
+        # Debug print to verify data
+        print(f"DEBUG: Activity {instance.title} current_signups: {instance.current_signups}")
+        return Response(serializer.data)
+
     @extend_schema(summary="报名活动")
     @action(detail=True, methods=['post'])
     def signup(self, request, pk=None):