Initial project

accounting/models.py

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+import sqlalchemy as sa
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker, relationship
+
+Base = declarative_base()
+
+
+class Account(Base):
+    __tablename__ = 'accounts'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    name = sa.Column(sa.String(100), nullable=False)
+    account_type = sa.Column(sa.String(50), nullable=False)  # Asset, Liability, Equity, Revenue, Expense
+    code = sa.Column(sa.String(20), unique=True, nullable=False)
+    parent_id = sa.Column(sa.Integer, sa.ForeignKey('accounts.id'))
+    balance = sa.Column(sa.Numeric(15, 2), default=0)
+
+    parent = relationship('Account', remote_side=[id])
+    entries = relationship('JournalEntryLine', back_populates='account')
+
+    def __repr__(self):
+        return f"<Account(code={self.code}, name={self.name}, type={self.account_type})>"
+
+
+class JournalEntry(Base):
+    __tablename__ = 'journal_entries'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    date = sa.Column(sa.Date, nullable=False)
+    reference = sa.Column(sa.String(100))
+    description = sa.Column(sa.String(200))
+    created_at = sa.Column(sa.DateTime, server_default=sa.func.now())
+
+    lines = relationship('JournalEntryLine', back_populates='journal_entry')
+
+
+class JournalEntryLine(Base):
+    __tablename__ = 'journal_entry_lines'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    journal_entry_id = sa.Column(sa.Integer, sa.ForeignKey('journal_entries.id'), nullable=False)
+    account_id = sa.Column(sa.Integer, sa.ForeignKey('accounts.id'), nullable=False)
+    amount = sa.Column(sa.Numeric(15, 2), nullable=False)
+    is_debit = sa.Column(sa.Boolean, nullable=False)  # True for debit, False for credit
+
+    journal_entry = relationship('JournalEntry', back_populates='lines')
+    account = relationship('Account', back_populates='entries')
+
+
+class BankAccount(Base):
+    __tablename__ = 'bank_accounts'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    name = sa.Column(sa.String(100), nullable=False)
+    account_number = sa.Column(sa.String(50))
+    bank_name = sa.Column(sa.String(100))
+    currency = sa.Column(sa.String(3), default='USD')
+    ledger_account_id = sa.Column(sa.Integer, sa.ForeignKey('accounts.id'))
+
+    ledger_account = relationship('Account')
+    transactions = relationship('BankTransaction', back_populates='bank_account')
+
+
+class BankTransaction(Base):
+    __tablename__ = 'bank_transactions'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    bank_account_id = sa.Column(sa.Integer, sa.ForeignKey('bank_accounts.id'), nullable=False)
+    date = sa.Column(sa.Date, nullable=False)
+    amount = sa.Column(sa.Numeric(15, 2), nullable=False)
+    description = sa.Column(sa.String(200))
+    reference = sa.Column(sa.String(100))
+    status = sa.Column(sa.String(20), default='unreconciled')  # unreconciled, reconciled
+    journal_entry_id = sa.Column(sa.Integer, sa.ForeignKey('journal_entries.id'))
+
+    bank_account = relationship('BankAccount', back_populates='transactions')
+    journal_entry = relationship('JournalEntry')
+
+
+class ReconciliationReport(Base):
+    __tablename__ = 'reconciliation_reports'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    bank_account_id = sa.Column(sa.Integer, sa.ForeignKey('bank_accounts.id'), nullable=False)
+    start_date = sa.Column(sa.Date, nullable=False)
+    end_date = sa.Column(sa.Date, nullable=False)
+    created_at = sa.Column(sa.DateTime, server_default=sa.func.now())
+    status = sa.Column(sa.String(20), default='draft')  # draft, completed
+
+    bank_account = relationship('BankAccount')
+    matches = relationship('ReconciliationMatch', back_populates='report')
+
+
+class ReconciliationMatch(Base):
+    __tablename__ = 'reconciliation_matches'
+
+    id = sa.Column(sa.Integer, primary_key=True)
+    report_id = sa.Column(sa.Integer, sa.ForeignKey('reconciliation_reports.id'), nullable=False)
+    transaction_id = sa.Column(sa.Integer, sa.ForeignKey('bank_transactions.id'), nullable=False)
+    journal_entry_id = sa.Column(sa.Integer, sa.ForeignKey('journal_entries.id'), nullable=False)
+    match_score = sa.Column(sa.Numeric(5, 2))  # 0-100 score for match quality
+    notes = sa.Column(sa.String(200))
+
+    report = relationship('ReconciliationReport', back_populates='matches')
+    transaction = relationship('BankTransaction')
+    journal_entry = relationship('JournalEntry')