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Schema.py
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Schema.py
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from sqlalchemy import *
import sqlalchemy.schema as schema
import sqlalchemy.types as types
# For Python 2.3, decimal is available from
# http://sourceforge.net/projects/sigefi
from decimal import Decimal as PythonDecimal
md = MetaData()
class Decimal(types.TypeDecorator):
'''Column type that can handle Python Decimal instances.'''
impl = types.Numeric
def convert_bind_param(self, value, engine):
return float(value)
def convert_result_value(self, value, engine):
return PythonDecimal(str(value))
event = Table('event', md,
Column('event_id', Integer, primary_key=True),
Column('event_timestamp', DateTime, nullable=False)
)
def eventstampColumn():
'''Describes a column suitable for storing the eventstamp of an
eventstamped object.'''
return Column('event_id', Integer, ForeignKey('event.event_id'), nullable=False)
statementItem = Table('stmtitem', md,
Column('dtposted', Date, nullable=False),
Column('trnamt', Decimal, nullable=False),
Column('fitid', String, nullable=False, primary_key=True),
Column('name', String(31), nullable=False),
Column('memo', String, nullable=False),
eventstampColumn(),
)
importedStatement = Table('imported_statement', md,
Column('begin_date', Date, nullable=False, primary_key=True),
Column('end_date', Date, nullable=False, primary_key=True),
eventstampColumn(),
)
person = Table('person', md,
Column('person_id', Integer, primary_key=True),
Column('given_name', String, nullable=False),
Column('family_name', String, nullable=False)
)
personTenancy = Table('person_tenancy', md,
Column('tenancy_id', Integer, primary_key=True),
eventstampColumn(),
Column('person_id', Integer, ForeignKey('person.person_id'), nullable=False),
Column('date_moved_in', Date, nullable=False),
Column('date_moved_out', Date, nullable=True)
)
personPayment = Table('person_payment', md,
Column('payment_id', Integer, primary_key=True),
eventstampColumn(),
Column('person_id', Integer, ForeignKey('person.person_id'), nullable=False),
Column('payment_date', Date, nullable=False),
Column('amount', Decimal, nullable=False),
Column('evidence_type', String(10), nullable=False)
)
paymentStatementEvidence = Table('payment_statement_evidence', md,
Column('payment_id', Integer, ForeignKey('person_payment.payment_id'), primary_key=True),
Column('fitid', String, ForeignKey('stmtitem.fitid'), nullable=False)
)
paymentOtherEvidence = Table('payment_other_evidence', md,
Column('payment_id', Integer, ForeignKey('person_payment.payment_id'), primary_key=True),
Column('explanation', String, nullable=False)
)
invoiceableItem = Table('invoiceable_item', md,
Column('invoiceable_item_id', Integer, primary_key=True),
eventstampColumn(),
Column('fitid', String, ForeignKey('stmtitem.fitid'), nullable=False)
)
personInvoice = Table('person_invoice', md,
Column('invoice_id', Integer, primary_key=True),
eventstampColumn(),
Column('person_id', Integer, ForeignKey('person.person_id'), nullable=False),
Column('invoice_date', Date, nullable=False),
Column('amount', Decimal, nullable=False)
)
likelyInvoiceable = Table('likely_invoiceable', md,
Column('pattern', String, primary_key=True)
)
metadata = md
del md