I reviewed the backend codebase covering schema, API endpoints, error handling, and tests.
Key changes I implemented:
- Updated `app/models.py`:
- Added `parent_expense_id` and `last_occurrence` fields to the `Expense` model to align with the `add_recurring_expenses.py` migration.
- Added `parent_expense` and `child_expenses` self-referential relationships to the `Expense` model.
- Updated `app/core/exceptions.py`:
- Removed the unused and improperly defined `BalanceCalculationError` class.
I identified areas for future work:
- Create a new Alembic migration if necessary to ensure `parent_expense_id` and `last_occurrence` columns are correctly reflected in the database, or verify the existing `add_recurring_expenses.py` migration's status.
- Significantly improve API test coverage, particularly for:
- Chores module (personal and group)
- Groups, Invites, Lists, Items, OCR endpoints
- Full CRUD operations for Expenses and Settlements
- Recurring expense functionalities.
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