Filter pending books from list display

bookwyrm/views/list.py

@@ -1,7 +1,7 @@
 ''' book list views'''
 from django.contrib.auth.decorators import login_required
 from django.core.paginator import Paginator
-from django.db.models import Q
+from django.db.models import Count, Q
 from django.http import HttpResponseNotFound, HttpResponseBadRequest
 from django.shortcuts import get_object_or_404, redirect
 from django.template.response import TemplateResponse
@@ -27,9 +27,13 @@ class Lists(View):
             page = 1
 
         user = request.user if request.user.is_authenticated else None
+        # hide lists with no approved books
         lists = models.List.objects.filter(
             ~Q(user=user),
-            books__isnull=False,
+        ).annotate(
+            item_count=Count('listitem', filter=Q(listitem__approved=True))
+        ).filter(
+            item_count__gt=0
         ).distinct().all()
         lists = privacy_filter(request.user, lists, ['public', 'followers'])