def _create_item(json):
production_id = json['production_id']
result = session.query(Production).filter(
Production.id == production_id).delete()
if result != 1:
raise Exception
item = Item(id_generator.generate())
session.add(item)
session.commit()
return item
def delete_production(self, production_id):
session.query(Production).filter(
Production.id == production_id).delete()
session.commit()
def read_productions(self) -> List[Production]:
return session.query(Production).all()
def read_production(self, production_id):
production = session.query(Production).filter(
Production.id == production_id).one_or_none()
return production
def read_nodes(self) -> List[Node]:
return session.query(Node).all()
def _read_item(item_id):
item = session.query(Item).filter(Item.id == item_id).one()
return item
def delete_nodes(self):
session.query(Unit).delete()
session.query(Node).delete()
session.commit()