A basic pony test

schema.py

from datetime import datetime
from datetime import timedelta
from pony.orm import *

db = Database("sqlite", "data.sqlite", create_db=True)


class User(db.Entity):
    #Answer 3 : Correcting User db
    domain = Optional('Domain')
    username = Required(unicode)
    password = Required(unicode)


class Page(db.Entity):
    url = Required(unicode)
    # I think scape_time should be time
    scrape_time = Required(datetime)
    html = Required(LongUnicode)
    domain = Required('Domain')


class Domain(db.Entity):
    url = Required(unicode)
    pages = Set('Page')
    user = Required('User')

sql_debug(True)
db.generate_mapping(create_tables=True)


for i in range(1,11):
    with db_session:
        user = User(username = 'user%s' %(i), password = 'password%s' %(i))
        commit()
        domain = Domain(url='http://example%s.com' %(i), user=user)
        commit()
        pages = []
        for i in range(1, 6):
            page = Page(url = '%s/%s%s' % (domain.url, 'document', i), 
                         scrape_time= datetime.now() + timedelta(seconds=1),
                         html='test', 
                         domain=domain
                         )

        commit()

# Answer 1:
with db_session:
    domains = select(d for d in Domain)
    for domain in domains:
        print domain.url
        print domain.user.username

#Answer 2:
with db_session:
    pages = select(d.pages for d in Domain if d.id == 8)
    for page in pages:
         print page.url