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import elixir
from elixir import Field, ManyToOne, ColumnProperty, using_options, using_options_defaults
from sqlalchemy import types as T
from functools import partial
elixir.metadata.bind = "sqlite:///test.sqlite"
elixir.metadata.bind.echo = True
ReqField = partial(Field, required = True)
class Entity (elixir.Entity):
using_options(abstract = True)
using_options_defaults(shortnames = True)
class Category (Entity):
name = Field(T.String(50), unique = True)
def __repr__ (self):
return '<Category "%s">' % self.name
class Expense (Entity):
using_options(abstract = True)
description = Field(T.String(50))
expense = ReqField(T.Numeric(scale = 2))
category = ManyToOne('Category', required = True, innerjoin = True)
class SingleExpense (Expense):
date = ReqField(T.Date)
class ConstExpense (Expense):
months = ReqField(T.Integer)
start = ReqField(T.Date)
end = ReqField(T.Date)
monthly = ColumnProperty(lambda c: c.expense / c.months)
elixir.setup_all()
session = elixir.session
if __name__ == "__main__":
elixir.create_all()
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