1 """The application's model objects"""
2 import sqlalchemy as sa
3 from sqlalchemy import orm
5 from bluechips.model import meta
6 from bluechips.model import types
8 def init_model(engine):
9 """Call me before using any of the tables or classes in the model"""
10 ## Reflected tables must be defined and mapped here
11 #global reflected_table
12 #reflected_table = sa.Table("Reflected", meta.metadata, autoload=True,
13 # autoload_with=engine)
14 #orm.mapper(Reflected, reflected_table)
16 sm = orm.sessionmaker(autoflush=True, transactional=True, bind=engine)
19 meta.Session = orm.scoped_session(sm)
21 ### Database Schemas ###
23 users = sa.Table('users', meta.metadata,
24 sa.Column('id', sa.types.Integer, primary_key=True),
25 sa.Column('username', sa.types.Unicode(32), nullable=False),
26 sa.Column('name', sa.types.Unicode(64)),
27 sa.Column('resident', sa.types.Boolean, default=True)
30 expenditures = sa.Table('expenditures', meta.metadata,
31 sa.Column('id', sa.types.Integer, primary_key=True),
32 sa.Column('spender_id', sa.types.Integer,
33 sa.ForeignKey('users.id'), nullable=False),
34 sa.Column('amount', types.Currency, nullable=False),
35 sa.Column('date', sa.types.Date, default=sa.func.now),
36 sa.Column('entered_time', sa.types.DateTime,
40 splits = sa.Table('splits', meta.metadata,
41 sa.Column('id', sa.types.Integer, primary_key=True),
42 sa.Column('expenditure_id', sa.types.Integer,
43 sa.ForeignKey('expenditures.id'), nullable=False),
44 sa.Column('user_id', sa.types.Integer,
45 sa.ForeignKey('users.id'), nullable=False),
46 sa.Column('share', sa.types.Integer, nullable=False)
49 subitems = sa.Table('subitems', meta.metadata,
50 sa.Column('id', sa.types.Integer, primary_key=True),
51 sa.Column('expenditure_id', sa.types.Integer,
52 sa.ForeignKey('expenditures.id'), nullable=False),
53 sa.Column('user_id', sa.types.Integer,
54 sa.ForeignKey('users.id'), nullable=False),
55 sa.Column('amount', types.Currency, nullable=False)
58 transfers = sa.Table('transfers', meta.metadata,
59 sa.Column('id', sa.types.Integer, primary_key=True),
60 sa.Column('debtor_id', sa.types.Integer,
61 sa.ForeignKey('users.id'), nullable=False),
62 sa.Column('creditor_id', sa.types.Integer,
63 sa.ForeignKey('users.id'), nullable=False),
64 sa.Column('amount', types.Currency, nullable=False),
65 sa.Column('date', sa.types.Date, default=sa.func.now),
66 sa.Column('entered_time', sa.types.DateTime,
68 sa.Column('desc', sa.Text, default=None)
75 return '<User: %w>' % (self.username)
77 class Expenditure(object):
79 return '<Expenditure: spender: %s spent: %s>' % (self.spender,
84 return '<Split: expense: %s user: %s share: %s%%>' % (self.expenditure,
88 class Subitem(object):
90 return '<Subitem: expense: %s user: %s cost: %s>' % (self.expense,
94 class Transfer(object):
96 return '<Transfer: from %s to %s for %s>' % (self.debtor,
100 ### DB/Class Mapping ###
102 orm.mapper(User, users)
104 orm.mapper(Expenditure, expenditures, properties={
105 'spender': orm.relation(User, backref='expenditures')
108 orm.mapper(Split, splits, properties={
109 'expenditure': orm.relation(Expenditure, backref='splits'),
110 'user': orm.relation(User)
113 orm.mapper(Subitem, subitems, properties={
114 'expenditure': orm.relation(Expenditure, backref='subitems'),
115 'user': orm.relation(User)
118 orm.mapper(Transfer, transfers, properties={
119 'debtor': orm.relation(User),
120 'creditor': orm.relation(User)
123 __all__ = [users, expenditures, splits, subitems, transfers,
124 User, Expenditure, Split, Subitem, Transfer,