Flask-SQLAlchemy, and many other ORMs ... Let's update seed.py to delete all rows in the table before adding new rows. Add the statement Pet.query.delete() as the first step in the seeding process: #!

We define the interface to an object manager whose operations are the executable elements of query execution plans. Parameters to the object manager interface are streams of tuples of object ...

For more information, see the docs. The snippet above will spin up a postgres database in a container. The get_connection_url() convenience method returns a sqlalchemy compatible url we use to connect ...