start porting: playlists endpoints

app/db/__init__.py

@@ -78,6 +78,10 @@ class Base(MappedAsDataclass, DeclarativeBase):
         with DbManager(commit=True) as conn:
             conn.execute(delete(cls))
 
+    @classmethod
+    def remove_one(cls, id: int):
+        cls.execute(delete(cls).where(cls.id == id), commit=True)
+
     @classmethod
     def all(cls):
         return cls.execute(select(cls))