Rental Dashboard (FastAPI edition)

A rental ledger for landlords with a few properties: income and expenses per property, and a monthly report that closes the books. FastAPI backend, Next.js frontend.

Live demo: rental-dashboard-navy.vercel.app ("Ver demo en vivo", no sign-up). The free Render backend sleeps, so the first request can take up to a minute.

This is the original version. The same API was later rebuilt in Spring Boot 4, and the frontend runs against it unchanged: rental-dashboard-spring.

Stack

• Backend (backend/): FastAPI, SQLAlchemy, Alembic, PostgreSQL. JWT auth in an httpOnly cookie, rate-limited login (slowapi). 41 pytest tests, written test-first.
• Frontend (frontend/): Next.js (App Router), TypeScript, Tailwind, shadcn/ui.
• Deploy: backend on Render (Docker, render.yaml), database on Neon, frontend on Vercel.

Running it

docker compose up -d          # Postgres + backend on :8000
cd frontend
echo "NEXT_PUBLIC_API_URL=http://localhost:8000" > .env.local
npm install && npm run dev    # http://localhost:3000

Tests

The tests use an in-memory SQLite database, so they need no Postgres:

cd backend
pip install -r requirements.txt
JWT_SECRET=test pytest