DrCr/drcr/general_journal/models.py

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2022-12-24 12:31:45 +11:00
# DrCr: Web-based double-entry bookkeeping framework
# Copyright (C) 2022 Lee Yingtong Li (RunasSudo)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from sqlalchemy import Column, DateTime, ForeignKey, Integer, String
from sqlalchemy.orm import relationship
from ..database import Base
from ..models import Amount, Posting, Transaction
class GeneralJournalTransaction(Base, Transaction):
__tablename__ = 'general_journal_transactions'
id = Column(Integer, primary_key=True)
dt = Column(DateTime)
description = Column(String)
postings = relationship('GeneralJournalPosting', back_populates='transaction', cascade='all, delete-orphan')
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class GeneralJournalPosting(Base, Posting):
__tablename__ = 'general_journal_postings'
id = Column(Integer, primary_key=True)
transaction_id = Column(Integer, ForeignKey('general_journal_transactions.id'))
description = Column(String)
account = Column(String)
quantity = Column(Integer)
commodity = Column(String)
transaction = relationship('GeneralJournalTransaction', back_populates='postings')
def amount(self):
return Amount(self.quantity, self.commodity)
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class BalanceAssertion(Base):
__tablename__ = 'balance_assertions'
id = Column(Integer, primary_key=True)
dt = Column(DateTime)
description = Column(String)
account = Column(String)
quantity = Column(Integer)
commodity = Column(String)
def balance(self):
return Amount(self.quantity, self.commodity)