Merge branch '581-0-tracks-library' into 'develop'

Fixed #581: missing track count on various library cards

Closes #581

See merge request !455

api/funkwhale_api/music/views.py

@@ -35,7 +35,7 @@ def get_libraries(filter_uploads):
         uploads = uploads.playable_by(actor)
         libraries = models.Library.objects.filter(
             pk__in=uploads.values_list("library", flat=True)
-        )
+        ).annotate(_uploads_count=Count("uploads"))
         libraries = libraries.select_related("actor")
         page = self.paginate_queryset(libraries)
         if page is not None:

api/tests/music/test_views.py

@@ -462,6 +462,7 @@ def test_can_get_libraries_for_music_entities(
         import_status="finished", library__privacy_level="me", track=upload.track
     ).library
     library = upload.library
+    setattr(library, "_uploads_count", 1)
     data = {
         "artist": upload.track.artist,
         "album": upload.track.album,