Fx #1178: Display channel and track downloads count

api/funkwhale_api/audio/serializers.py

@@ -235,6 +235,7 @@ class ChannelUpdateSerializer(serializers.Serializer):
 class ChannelSerializer(serializers.ModelSerializer):
     artist = serializers.SerializerMethodField()
     actor = serializers.SerializerMethodField()
+    downloads_count = serializers.SerializerMethodField()
     attributed_to = federation_serializers.APIActorSerializer()
     rss_url = serializers.CharField(source="get_rss_url")
     url = serializers.SerializerMethodField()
@@ -250,6 +251,7 @@ class ChannelSerializer(serializers.ModelSerializer):
             "metadata",
             "rss_url",
             "url",
+            "downloads_count",
         ]
 
     def get_artist(self, obj):
@@ -264,6 +266,9 @@ class ChannelSerializer(serializers.ModelSerializer):
     def get_subscriptions_count(self, obj):
         return obj.actor.received_follows.exclude(approved=False).count()
 
+    def get_downloads_count(self, obj):
+        return getattr(obj, "_downloads_count", None)
+
     def get_actor(self, obj):
         if obj.attributed_to == actors.get_service_actor():
             return None

api/funkwhale_api/audio/views.py

@@ -7,7 +7,7 @@ from rest_framework import viewsets
 
 from django import http
 from django.db import transaction
-from django.db.models import Count, Prefetch, Q
+from django.db.models import Count, Prefetch, Q, Sum
 from django.utils import timezone
 
 from funkwhale_api.common import locales
@@ -93,6 +93,14 @@ class ChannelViewSet(
             return serializers.ChannelUpdateSerializer
         return serializers.ChannelCreateSerializer
 
+    def get_queryset(self):
+        queryset = super().get_queryset()
+        if self.action == "retrieve":
+            queryset = queryset.annotate(
+                _downloads_count=Sum("artist__tracks__downloads_count")
+            )
+        return queryset
+
     def perform_create(self, serializer):
         return serializer.save(attributed_to=self.request.user.actor)