Reverted work from 2018 class.

diner.py

@@ -15,7 +15,6 @@ class Menu(Persisted):
     __tablename__ = 'menus'
     menu_id = Column(Integer, primary_key=True)  # primary keys default to auto_increment
     name = Column(String(256), nullable=False)  # nullable is the default
-    items = relationship('Item', uselist=True, back_populates='menu')
 
 
 class Item(Persisted):
@@ -25,17 +24,12 @@ class Item(Persisted):
     menu_id = Column(Integer, ForeignKey('menus.menu_id', ondelete='CASCADE'), nullable=False)
     name = Column(String(256), nullable=False)
     price = Column(Integer, nullable=False)
-    menu = relationship('Menu', back_populates='items')
-    orders = relationship('Order', uselist=True, secondary='order_items')
-    order_items = relationship('OrderItem', uselist=True, back_populates='item')
 
 
 class Order(Persisted):
     __tablename__ = 'orders'
     order_id = Column(Integer, primary_key=True)
     timestamp = Column(DateTime)
-    items = relationship('Item', uselist=True, secondary='order_items')
-    order_items = relationship('OrderItem', uselist=True, back_populates='order')
 
 
 class OrderItem(Persisted):
@@ -43,8 +37,6 @@ class OrderItem(Persisted):
     order_id = Column(Integer, ForeignKey('orders.order_id', ondelete='CASCADE'), primary_key=True)
     item_id = Column(Integer, ForeignKey('items.item_id', ondelete='CASCADE'), primary_key=True)
     amount = Column(Integer)
-    order = relationship('Order', back_populates='order_items')
-    item = relationship('Item', back_populates='order_items')
 
 
 class DinerDatabase(object):

diner_installer.py

@@ -29,7 +29,7 @@ def main():
         diner_database.ensure_tables_exist()
         print('Tables created.')
         session = diner_database.create_session()
-        add_starter_data(session)
+        # add_starter_data(session)
         session.commit()
         print('Records created.')
     except SQLAlchemyError as exception: