🚀 Ultimate FastAPI Snippets Collection

Accelerate your FastAPI development with 50+ production-ready code snippets covering everything from authentication to deployment!

🌟 Features

• 50+ meticulously crafted snippets for FastAPI development
• Production-ready patterns following best practices
• Comprehensive coverage of essential FastAPI features
• Time-saving templates for common development tasks
• Regularly updated with new patterns and optimizations

🧩 Snippet Categories

Category	Snippets	Description
⚡ Core	fastimp, fastapp, fastrouter	Essential imports, app instance, routers
🔒 Security	fastsecurity, fastoauth, fastroles	Authentication, OAuth2, RBAC
💾 Database	fastdb, fastsqla, fastasyncdb	SQLAlchemy models, async DB connections
📡 Endpoints	fastget, fastpost, fastupload	REST endpoints, file uploads
🚀 Advanced	fastws, fastcache, fastemail	WebSockets, Redis caching, background emails
🛠️ Operations	fasthealth, fastlog	health checks, logging
🧪 Testing	fasttest, fastexcept	Test clients, custom exceptions

🚀 Top 10 Most Useful Snippets

1. fastsecurity - Complete JWT authentication setup

   # Password hashing
   pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
   
   # JWT Configuration
   SECRET_KEY = "your-secret-key"
   ALGORITHM = "HS256"
   ACCESS_TOKEN_EXPIRE_MINUTES = 30

2. fastcrud - Full CRUD operations template

   @router.get("/", response_model=List[Model])
   def read_items(db: Session = Depends(get_db)):
       return db.query(Model).all()

3. fastcache - Redis caching implementation

   @app.on_event("startup")
   async def startup():
       redis = aioredis.from_url("redis://localhost")
       FastAPICache.init(RedisBackend(redis), prefix="fastapi-cache")
   
   @app.get("/cached-data/")
   @cache(expire=60)
   async def get_cached_data():
       return {"data": "expensive to compute"}

4. fastlimit - API rate limiting

   limiter = Limiter(key_func=get_remote_address)
   app.state.limiter = limiter
   
   @app.get("/limited/")
   @limiter.limit("5/minute")
   async def limited_route(request: Request):
       return {"message": "Rate limited endpoint"}

5. fastemail - Background email sending

   async def send_welcome_email(email: str):
       message = MessageSchema(
           subject="Welcome!",
           recipients=[email],
           body="<strong>Thanks for joining!</strong>",
           subtype="html"
       )
       await fm.send_message(message)

6. fastasyncdb - Async database connection

   database = Database(DATABASE_URL)
   
   @app.on_event("startup")
   async def startup():
       await database.connect()
   
   @app.get("/async-items/")
   async def read_async_items():
       return await database.fetch_all("SELECT * FROM items")

7. fastresponse - High-performance ORJSON response

   @app.get("/custom-response/", response_class=ORJSONResponse)
   async def custom_response():
       return ORJSONResponse(
           content={"message": "Faster JSON response"},
           headers={"X-Custom-Header": "value"}
       )

8. fastbroadcast - WebSocket broadcast manager

   class ConnectionManager:
       def __init__(self):
           self.rooms: dict = defaultdict(dict)
   
       async def broadcast(self, room: str, message: str):
           for connection in self.rooms[room].values():
               await connection.send_text(message)

9. fastlog - Professional logging configuration

   LOGGING_CONFIG = {
       "version": 1,
       "formatters": {"standard": {"format": "%(asctime)s [%(levelname)s] %(name)s: %(message)s"}},
       "handlers": {"console": {"class": "logging.StreamHandler", "formatter": "standard"}},
       "loggers": {"": {"handlers": ["console"], "level": "INFO"}}
   }

10. fastsqla - SQLAlchemy database setup

    from sqlalchemy import create_engine
    from sqlalchemy.ext.declarative import declarative_base
    from sqlalchemy.orm import sessionmaker
    
    SQLALCHEMY_DATABASE_URL = \"${1:sqlite:///./test.db}\"
    
    engine = create_engine(
          SQLALCHEMY_DATABASE_URL,
          connect_args={\"check_same_thread\": False}  # SQLite only",
    ),
    SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine),
    Base = declarative_base()

📊 Snippet Usage Statistics

pie
    title Snippet Category Usage
    "Core" : 20
    "Security" : 15
    "Database" : 18
    "Endpoints" : 22
    "Advanced" : 15
    "Operations" : 10

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🛠️ Customization Tips

1. Personalize Placeholders - Replace all ${...} variables with your specific values

   app = FastAPI(
       title="My Awesome API",  # ← Change this
       version="1.0.0"         # ← And this
   )

2. Combine Snippets - Create powerful combinations:

   • fastsecurity + fastroles = Full authentication with RBAC
   • fastdb + fastcrud = Complete database workflow
   • fastcache + fastasyncdb = High-performance data layer

3. Extend for Your Needs - Use snippets as foundations for custom implementations:

   # Original
   @cache(expire=60)
   
   # Extended with custom key
   @cache(expire=300, key_builder=custom_key_builder)

🤝 Contribution Guidelines

We welcome contributions! Here's how to help:

1. Fork the repository
2. Create a new branch (git checkout -b feature/new-snippet)
3. Add your snippet to snippets.json
4. Update the README if needed
5. Submit a pull request

Snippet Requirements:

• Must solve a common FastAPI problem
• Follow FastAPI best practices
• Include proper documentation
• Have a unique prefix starting with "fast"

📜 License

This project is licensed under the MIT License - see the LICENSE file for details.

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Happy Coding! 🐍⚡