feat: add atomic assign-items endpoints for video and podcast playlists and update author ordering

apps/library/migrations/0009_alter_author_options.py

@@ -0,0 +1,17 @@
+# Generated by Django 4.2.30 on 2026-08-27 11:03
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('library', '0008_alter_author_slug_alter_book_slug_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='author',
+            options={'ordering': ['-created_at', '-id'], 'verbose_name': 'Author', 'verbose_name_plural': 'Authors'},
+        ),
+    ]

apps/library/models.py

@@ -122,7 +122,7 @@ class Author(LowercaseSlugMixin, models.Model):
     class Meta:
         verbose_name = _('Author')
         verbose_name_plural = _('Authors')
-        ordering = ['full_name', 'id']
+        ordering = ['-created_at', '-id']
 
     def __str__(self):
         return self.full_name

apps/library/views.py

@@ -268,7 +268,7 @@ class AuthorListView(ListAPIView):
     def get_queryset(self):
         return Author.objects.annotate(
             books_count_annotation=Count('books', filter=Q(books__status=True))
-        ).order_by('full_name', 'id')
+        ).order_by('-created_at', '-id')
 
 
 class AuthorDetailView(RetrieveAPIView):

apps/library/views_admin.py

@@ -133,7 +133,7 @@ class AdminAuthorViewSet(ModelViewSet):
                 | Q(slug__icontains=search_query)
             )
 
-        return queryset.order_by("full_name", "id")
+        return queryset.order_by("-created_at", "-id")
 
     @action(detail=True, methods=["post"], url_path="assign-books")
     def assign_books(self, request, pk=None):

apps/podcast/views_admin.py

@@ -211,3 +211,39 @@ class AdminPodcastPlaylistViewSet(ModelViewSet):
             context={"request": request},
         )
         return Response(serializer.data)
+
+    @action(detail=True, methods=["post"], url_path="assign-items")
+    def assign_items(self, request, pk=None):
+        playlist = self.get_object()
+        add_ids = request.data.get("add_ids", []) or request.data.get("podcast_ids", []) or request.data.get("item_ids", [])
+        remove_ids = request.data.get("remove_ids", [])
+
+        with transaction.atomic():
+            if remove_ids:
+                playlist.playlist_items.filter(id__in=remove_ids).delete()
+
+            if add_ids:
+                existing_podcast_ids = set(playlist.playlist_items.values_list("podcast_id", flat=True))
+                new_podcast_ids = [pid for pid in add_ids if pid not in existing_podcast_ids]
+                current_count = playlist.playlist_items.count()
+                new_items = [
+                    PlaylistItem(
+                        playlist=playlist,
+                        podcast_id=pid,
+                        priority=current_count + idx + 1,
+                    )
+                    for idx, pid in enumerate(new_podcast_ids)
+                ]
+                if new_items:
+                    PlaylistItem.objects.bulk_create(new_items)
+
+            playlist.total_time = playlist.calculate_total_time()
+            playlist.save(update_fields=["total_time"])
+
+        serializer = AdminPodcastPlaylistItemSerializer(
+            playlist.playlist_items.select_related("podcast").order_by("priority", "id"),
+            many=True,
+            context={"request": request},
+        )
+        return Response(serializer.data, status=status.HTTP_200_OK)
+

apps/video/views_admin.py

@@ -208,3 +208,39 @@ class AdminVideoPlaylistViewSet(ModelViewSet):
             context={"request": request},
         )
         return Response(serializer.data)
+
+    @action(detail=True, methods=["post"], url_path="assign-items")
+    def assign_items(self, request, pk=None):
+        playlist = self.get_object()
+        add_ids = request.data.get("add_ids", []) or request.data.get("video_ids", []) or request.data.get("item_ids", [])
+        remove_ids = request.data.get("remove_ids", [])
+
+        with transaction.atomic():
+            if remove_ids:
+                playlist.playlist_items.filter(id__in=remove_ids).delete()
+
+            if add_ids:
+                existing_video_ids = set(playlist.playlist_items.values_list("video_id", flat=True))
+                new_video_ids = [vid for vid in add_ids if vid not in existing_video_ids]
+                current_count = playlist.playlist_items.count()
+                new_items = [
+                    PlaylistItem(
+                        playlist=playlist,
+                        video_id=vid,
+                        priority=current_count + idx + 1,
+                    )
+                    for idx, vid in enumerate(new_video_ids)
+                ]
+                if new_items:
+                    PlaylistItem.objects.bulk_create(new_items)
+
+            playlist.total_time = playlist.calculate_total_time()
+            playlist.save(update_fields=["total_time"])
+
+        serializer = AdminVideoPlaylistItemSerializer(
+            playlist.playlist_items.select_related("video").order_by("priority", "id"),
+            many=True,
+            context={"request": request},
+        )
+        return Response(serializer.data, status=status.HTTP_200_OK)
+