fastapi-repository-pattern

Codice completo dell'articolo "Repository Pattern in FastAPI: Quando e Perche Usarlo" pubblicato su layerbylayer.dev.

Articolo

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Quick Start

git clone https://github.com/layerbylayer-blog/fastapi-repository-pattern
cd fastapi-repository-pattern
cp .env.example .env
# edit .env with your values
docker-compose up -d
pip install -r requirements.txt
uvicorn app.main:app --reload

Struttura

• app/repositories/base_repository.py — BaseRepository generico con operazioni CRUD
• app/repositories/story_repository.py — StoryRepository con query specifiche
• app/repositories/user_repository.py — UserRepository con update stats
• app/services/story_service.py — StoryService con business logic e calcolo emotional score
• app/dependencies.py — Dependency injection FastAPI
• app/routers/stories.py — Router pulito che delega al service
• app/models.py — Modelli SQLAlchemy (Story, User)
• app/schemas.py — Schemi Pydantic
• tests/test_story_service.py — Test con mock (zero database)

Pattern

Router → Service (business logic) → Repository (SQL) → Database