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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
Base = declarative_base()
class Driver(Base):
__tablename__ = 'drivers'
id = Column(Integer, primary_key=True)
driver = Column(String(1024))
country = Column(String(255))
rankings = relationship('Ranking', order_by='Ranking.rank_date', back_populates='driver')
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
session.add(driver)
return driver
driver_entry = Table('driver_entries', Base.metadata,
Column('_driver', Integer, ForeignKey('drivers.id')),
Column('_entry', Integer, ForeignKey('entries.id')),
Column('id', Integer))
class Entry(Base):
__tablename__ = 'entries'
id = Column(Integer, primary_key=True)
result = Column(String(255))
car_no = Column(String(255))
result_group = Column(Integer)
_race = Column(Integer, ForeignKey('races.id'))
race = relationship('Race', back_populates='entries', order_by=result_group)
drivers = relationship('Driver', secondary=driver_entry)
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')
class Race(Base):
__tablename__ = 'races'
id = Column(Integer, primary_key=True)
race = Column(String(1024))
date = Column(Date)
ranked = Column(Boolean, default=False)
_type = Column(Integer, ForeignKey('race_types.id'))
type = relationship('RaceType', back_populates='races', order_by='Race.date')
entries = relationship('Entry', back_populates='race', order_by='Entry.result_group')
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))
description = Column(String(1024))
races = relationship('Race', back_populates='type')
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)
ranking = Column(Float)
_driver = Column(Integer, ForeignKey('drivers.id'))
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__ = ['Driver', 'Entry', 'Ranking', 'Race', 'RaceType']
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