A hand-rolled month-arithmetic module survived the move to dateutil with no caller left but its own tests, and two predicates alongside it were never wired up at all. An error import was also being deferred inside a function for a circular dependency that does not exist.
Backend — Föräldraledigplannerare
FastAPI + Python 3.14, packages managed with uv. Layered architecture
(entities → repositories → services → routers) with dependency injection so the
database backend (SQLite now, Postgres later) is swappable.
Setup
uv sync # install deps (incl. dev group)
uv run uvicorn app.main:app --reload # run dev server on :8000
uv run pytest # run tests with coverage
uv run ruff check . # lint
Layout
app/
config.py # pydantic-settings (app config + frozen LeaveRules)
dependencies.py # DI factories (pick repo impl by settings.database_type)
entities/ # plain dataclasses (domain)
models/ # pydantic API schemas
repositories/ # abstract interfaces
repositories_impl/ # concrete impls per backend (sqlite/, postgres/)
services/ # business logic
routers/ # FastAPI routes
db/connection.py # connection + (dev) schema bootstrap
utils/ # errors, logger
Demo data (manual/browser testing)
scripts/seed_demo.py seeds a realistic, ready-to-explore workspace through the
normal service/repository layers (no raw SQL) — a couple workspace with a
partner, a child born ~6 months ago, vacation rows for only some years (so the
is_assumed badge is visible), day overrides, and a spread of leave wishes
(fixed, flexible, and one deliberately underfunded to show a shortfall +
remedies + surplus advice). Login credentials are fixed and printed at the end.
uv run python scripts/seed_demo.py # create once; re-running is a no-op
uv run python scripts/seed_demo.py --reset # wipe the demo workspace and rebuild
Then open http://localhost:5173 and log in with the printed demo@example.com
credentials. Safe to re-run: without --reset it detects the existing demo
user and changes nothing; --reset only ever deletes the one demo workspace.
Reference vertical slice
VacationDays is implemented end-to-end (entity → schema → repo interface →
SQLite impl → service → router → tests). Copy this slice when adding a new
entity.
The inline schema in
db/connection.pyexists only so dev/tests are self-contained. Production schema is owned by Alembic migrations (a senior task).