Mark playlist last used on creation

Fixes #249

app/models.py

@@ -65,7 +65,8 @@ class NoteColours(dbtables.NoteColoursTable):
         Return all records
         """
 
-        return session.scalars(select(cls)).all()
+        result = session.scalars(select(cls)).all()
+        return result
 
     @staticmethod
     def get_colour(session: Session, text: str) -> Optional[str]:
@@ -167,6 +168,7 @@ class Playdates(dbtables.PlaydatesTable):
 class Playlists(dbtables.PlaylistsTable):
     def __init__(self, session: Session, name: str):
         self.name = name
+        self.last_used = dt.datetime.now()
         session.add(self)
         session.commit()
 
@@ -192,10 +194,14 @@ class Playlists(dbtables.PlaylistsTable):
     ) -> Optional["Playlists"]:
         """Create a new playlist from template"""
 
+        # Sanity check
+        if not template.id:
+            return None
+
         playlist = cls(session, playlist_name)
 
         # Sanity / mypy checks
-        if not playlist or not playlist.id or not template.id:
+        if not playlist or not playlist.id:
             return None
 
         PlaylistRows.copy_playlist(session, template.id, playlist.id)