[templates] Clean up how str and subtitles work

vrobbler/apps/scrobbles/views.py

@@ -184,7 +184,7 @@ class ScrobbleableDetailView(ChartContextMixin, DetailView):
     def get_context_data(self, **kwargs):
         context_data = super().get_context_data(**kwargs)
         scrobbles = []
-        if not self.request.user.is_anonymous:
+        if not self.request.user.is_anonymous and hasattr(self.object, "scrobble_set"):
             scrobbles = self.object.scrobble_set.filter(
                 user=self.request.user
             ).order_by("-timestamp")
@@ -439,8 +439,7 @@ class ScrobbleListView(LoginRequiredMixin, ListView):
         full_qs = getattr(self, "_full_queryset", None)
         if full_qs is not None and getattr(self, "tag_list", []):
             total = (
-                full_qs.aggregate(total=Sum("playback_position_seconds"))["total"]
-                or 0
+                full_qs.aggregate(total=Sum("playback_position_seconds"))["total"] or 0
             )
             ctx["total_time_seconds"] = total
         return ctx
@@ -1245,8 +1244,7 @@ class ScrobbleDetailView(DetailView):
                 track=media_obj, user=self.object.user
             ).order_by("-timestamp")[:20]
             context["has_mopidy_uri"] = any(
-                (s.log or {}).get("raw_data", {}).get("mopidy_uri")
-                for s in scrobbles
+                (s.log or {}).get("raw_data", {}).get("mopidy_uri") for s in scrobbles
             )
         else:
             context["has_mopidy_uri"] = False