Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
This is from my blog post on on 2013-03-01
from sqlalchemy import create_engine
engine = create_engine('sqlite:///:memory', echo=True)
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.ext.hybrid import hybrid_property
Base = declarative_base()
from sqlalchemy import Column, Integer, String, Float
class Order(Base):
__tablename__ = 'orders'
order_id = Column(Integer, primary_key=True)
order_reference_code = Column(String)
merchandise_cost = Column(Float)
tax = Column(Float)
shipping = Column(Float)
def __init__(self, order_reference_code, merchandise_cost, tax, shipping):
self.order_reference_code = order_reference_code
self.merchandise_cost = merchandise_cost = tax
self.shipping = shipping
def grand_total(self):
rollup_fields = [
total = sum([self.__getattribute__(x) for x in rollup_fields])
return round(total, 2)
order1 = Order('ABC', 57.50, 11.75, 6.00)
order2 = Order('BCD', 21.42, 4.72, 3.00)
order3 = Order('CDE', 1000.50, 80.34, 0.00)
order4 = Order('DEF', 500.50, 45.34, 100.00)
from sqlalchemy.orm import sessionmaker
Session = sessionmaker(bind=engine)
db = Session()
for order in db.query(Order).all():
print order.order_reference_code, order.grand_total
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.