from typing import Optional import databases import ormar import sqlalchemy DATABASE_URL = "sqlite:///test.db" ormar_base_config = ormar.OrmarConfig( database=databases.Database(DATABASE_URL), metadata=sqlalchemy.MetaData(), ) class Album(ormar.Model): ormar_config = ormar_base_config.copy(tablename="album") id: int = ormar.Integer(primary_key=True) name: str = ormar.String(max_length=100) class Track(ormar.Model): ormar_config = ormar_base_config.copy(tablename="track") id: int = ormar.Integer(primary_key=True) album: Optional[Album] = ormar.ForeignKey(Album) title: str = ormar.String(max_length=100) position: int = ormar.Integer()