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from sqlalchemy import Column, ForeignKey, Table
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import backref, relationship, sessionmaker
from sqlalchemy.types import Boolean, Date, Float, Integer, String
from functools import total_ordering
import sys
Base = declarative_base()
class Country(Base):
__tablename__ = 'countries'
id = Column(Integer, primary_key=True)
name = Column(String(255), index=True)
drivers = relationship(
'Driver',
back_populates='country',
cascade="all",
passive_deletes=True)
@staticmethod
def fetch(name, session):
country = session.query(Country).filter(Country.name == name).first()
if not country:
country = Country()
country.name = name
session.add(country)
return country
class Driver(Base):
__tablename__ = 'drivers'
id = Column(Integer, primary_key=True)
driver = Column(String(255), index=True)
_country = Column(
Integer,
ForeignKey(
'countries.id',
onupdate="CASCADE",
ondelete="CASCADE"))
country = relationship(
'Country',
back_populates='drivers',
order_by='Driver.id')
rankings = relationship(
'Ranking',
order_by='Ranking.rank_date,Ranking.id',
back_populates='driver',
cascade="all",
passive_deletes=True)
def __repr__(self):
return (u"<%s (#%d)>" % (self.driver, self.id)).encode('utf8')
def get_ranking(self, rank_date=None):
ranks = self.rankings
if rank_date is not None:
ranks = [r for r in ranks if r.rank_date <= rank_date]
if len(ranks):
return ranks[-1]
return None
@staticmethod
def fetch(name, country, session):
driver = session.query(Driver).filter(Driver.driver == name).first()
if not driver:
driver = Driver()
driver.driver = name
driver.country = Country.fetch(country, session)
session.add(driver)
return driver
driver_entry = Table('driver_entries', Base.metadata,
Column(
'_driver',
Integer,
ForeignKey(
'drivers.id',
onupdate="CASCADE",
ondelete="CASCADE")),
Column(
'_entry',
Integer,
ForeignKey(
'entries.id',
onupdate="CASCADE",
ondelete="CASCADE")),
Column('id', Integer, primary_key=True))
@total_ordering
class Entry(Base):
__tablename__ = 'entries'
id = Column(Integer, primary_key=True)
result = Column(String(255))
car_no = Column(Integer, index=True)
result_group = Column(Integer, index=True)
_race = Column(
Integer,
ForeignKey(
'races.id',
onupdate="CASCADE",
ondelete="CASCADE"))
race = relationship(
'Race',
back_populates='entries',
order_by=result_group)
drivers = relationship(
'Driver',
secondary=driver_entry,
cascade="all",
passive_deletes=True)
def __repr__(self):
return ('#%s (%s) %s[%d]' % (self.car_no, ', '.join([driver.__repr__().decode('utf8') for driver in self.drivers]), self.result, self.result_group)).encode('utf8')
def __eq__(self, other):
return self.id == other.id
def __lt__(self, other):
try:
self_result = int(self.result)
except ValueError:
self_result = sys.maxint
try:
other_result = int(other.result)
except ValueError:
other_result = sys.maxint
if self_result == other_result:
if self.result_group == other.result_group:
return self.id < other.id
else:
return self.result_group < other.result_group
else:
return self_result < other_result
class Race(Base):
__tablename__ = 'races'
id = Column(Integer, primary_key=True)
race = Column(String(1024))
date = Column(Date, index=True)
ranked = Column(Boolean, nullable=False, server_default='0', default=False, index=True)
_type = Column(
Integer,
ForeignKey(
'race_types.id',
onupdate="CASCADE",
ondelete="CASCADE"))
type = relationship(
'RaceType',
back_populates='races',
order_by='Race.date')
entries = relationship(
'Entry',
back_populates='race',
order_by='Entry.result_group',
cascade="all",
passive_deletes=True)
def __repr__(self):
return ('%s (%s)' % (self.race, self.date)).encode('utf8')
class RaceType(Base):
__tablename__ = 'race_types'
id = Column(Integer, primary_key=True)
code = Column(String(255), index=True)
description = Column(String(1024))
races = relationship(
'Race',
back_populates='type',
cascade="all",
passive_deletes=True)
def __repr__(self):
return ('%s (%s)' % (self.description, self.code)).encode('utf8')
class Ranking(Base):
__tablename__ = 'rankings'
id = Column(Integer, primary_key=True)
rank_date = Column(Date, index=True)
ranking = Column(Float, index=True)
_driver = Column(
Integer,
ForeignKey(
'drivers.id',
onupdate="CASCADE",
ondelete="CASCADE"))
driver = relationship(
'Driver',
back_populates='rankings',
order_by=rank_date)
def __repr__(self):
return ("%s: %0.2f (%s)" % (self.driver.__repr__().decode('utf8'), self.ranking, self. rank_date)).encode('utf8')
__all__ = ['Country', 'Driver', 'Entry', 'Ranking', 'Race', 'RaceType']
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