Fix ChannelFileSummaryViewSet becasuse no middleware?

Author: ivanistheone

kolibri/content/api.py

@@ -7,7 +7,7 @@
 from django.db.models import Q, Sum
 from django.db.models.aggregates import Count
 from kolibri.content import models, serializers
-from kolibri.content.content_db_router import get_active_content_database
+from kolibri.content.content_db_router import get_active_content_database, using_content_database
 from kolibri.logger.models import ContentSessionLog, ContentSummaryLog
 from le_utils.constants import content_kinds
 from rest_framework import filters, pagination, viewsets
@@ -359,10 +359,11 @@ def get_queryset(self):
 
 class ChannelFileSummaryViewSet(viewsets.ViewSet):
     def list(self, request, **kwargs):
-        file_summary = models.File.objects.aggregate(
-            total_files=Count('pk'),
-            total_file_size=Sum('file_size')
-        )
-        file_summary['channel_id'] = get_active_content_database()
-        # Need to wrap in an array to be fetchable as a Collection on client
-        return Response([file_summary])
+        with using_content_database(kwargs['channel_id']):
+            file_summary = models.File.objects.aggregate(
+                total_files=Count('pk'),
+                total_file_size=Sum('file_size')
+            )
+            file_summary['channel_id'] = get_active_content_database()
+            # Need to wrap in an array to be fetchable as a Collection on client
+            return Response([file_summary])