93 lines
3.2 KiB
Python
93 lines
3.2 KiB
Python
# DrCr: Web-based double-entry bookkeeping framework
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# Copyright (C) 2022 Lee Yingtong Li (RunasSudo)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from sqlalchemy import Column, DateTime, ForeignKey, Integer, String
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from sqlalchemy.orm import relationship
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from ..database import Base
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from ..models import Amount, Posting, Transaction
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class StatementLine(Base):
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__tablename__ = 'statement_lines'
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id = Column(Integer, primary_key=True)
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source_account = Column(String)
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dt = Column(DateTime)
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description = Column(String)
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quantity = Column(Integer)
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balance = Column(Integer)
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commodity = Column(String)
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postings = relationship('StatementLinePosting', back_populates='statement_line')
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def amount(self):
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return Amount(self.quantity, self.commodity)
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def into_transaction(self):
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if len(self.postings) > 0:
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# Will already be accounted for in a StatementLineTransaction
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#return None
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raise Exception('Should not call into_transaction on a StatementLine with associated StatementLinePosting')
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# Not classified
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unclassified_name = 'Unclassified Statement Line Debits' if -self.quantity >= 0 else 'Unclassified Statement Line Credits'
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return Transaction(
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dt=self.dt,
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description=self.description,
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postings=[
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Posting(account=self.source_account, quantity=self.quantity, commodity=self.commodity),
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Posting(account=unclassified_name, quantity=-self.quantity, commodity=self.commodity)
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]
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)
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class StatementLineTransaction(Base, Transaction):
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__tablename__ = 'statement_line_transactions'
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id = Column(Integer, primary_key=True)
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dt = Column(DateTime)
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description = Column(String)
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postings = relationship('StatementLinePosting', back_populates='transaction', cascade='all, delete')
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def charge_account(self, source_account):
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if len(self.postings) > 2:
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raise Exception('Cannot call charge_account on StatementLineTransaction with more than 2 postings')
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for posting in self.postings:
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if posting.account != source_account:
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return posting.account
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class StatementLinePosting(Base, Posting):
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__tablename__ = 'statement_line_postings'
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id = Column(Integer, primary_key=True)
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transaction_id = Column(Integer, ForeignKey('statement_line_transactions.id'))
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line_id = Column(Integer, ForeignKey('statement_lines.id'))
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description = Column(String)
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account = Column(String)
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quantity = Column(Integer)
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commodity = Column(String)
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transaction = relationship('StatementLineTransaction', back_populates='postings')
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statement_line = relationship('StatementLine', back_populates='postings')
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def amount(self):
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return Amount(self.quantity, self.commodity)
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