fastapi-production-patterns
Build production-ready FastAPI applications with async patterns, Pydantic validation, dependency injection, middleware, and database integration. Use for FastAPI endpoints, async workflows, or API design. Use when this capability is needed.
معلومات المصدر
- المستودع
- tomevault-io/skills-registry
- آخر نشاط في المصدر
- ٢٨ أبريل ٢٠٢٦ في ٢٢:٥٣
- لغة SKILL.md المكتشفة
- الإنجليزية
- النجوم
- ٠
- التفرعات
- ٠
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SKILL.md
تعليمات المصدر · معاينة للقراءة فقط- name
- fastapi-production-patterns
- description
- Build production-ready FastAPI applications with async patterns, Pydantic validation, dependency injection, middleware, and database integration. Use for FastAPI endpoints, async workflows, or API design. Use when this capability is needed.
- metadata
- {"author":"ak-eyther"}
# FastAPI Production Patterns
## App Structure with Lifespan
```python
from fastapi import FastAPI
from contextlib import asynccontextmanager
@asynccontextmanager
async def lifespan(app: FastAPI):
# Startup
await database.connect()
yield
# Shutdown
await database.disconnect()
app = FastAPI(lifespan=lifespan)
```
## Async Endpoints
```python
from fastapi import FastAPI, Depends
from sqlalchemy.ext.asyncio import AsyncSession
@app.get("/users/{user_id}")
async def get_user(
user_id: int,
db: AsyncSession = Depends(get_db)
):
user = await db.get(User, user_id)
if not user:
raise HTTPException(status_code=404, detail="User not found")
return user
```
## Pydantic Models with Validation
```python
from pydantic import BaseModel, validator, Field
class UserCreate(BaseModel):
email: str = Field(..., example="user@example.com")
age: int = Field(..., ge=0, le=150)
@validator('email')
def validate_email(cls, v):
if '@' not in v or '.' not in v.split('@')[1]:
raise ValueError('Invalid email format')
return v.lower()
class Config:
orm_mode = True
```
## Dependency Injection
```python
from sqlalchemy.ext.asyncio import AsyncSession
async def get_db() -> AsyncSession:
async with AsyncSessionLocal() as session:
yield session
async def get_current_user(
token: str = Depends(oauth2_scheme),
db: AsyncSession = Depends(get_db)
):
user = await verify_token(token, db)
return user
@app.get("/me")
async def read_users_me(
current_user: User = Depends(get_current_user)
):
return current_user
```
## CORS Middleware
```python
from fastapi.middleware.cors import CORSMiddleware
app.add_middleware(
CORSMiddleware,
allow_origins=["https://yourdomain.com"],
allow_credentials=True,
allow_methods=["GET", "POST", "PUT", "DELETE"],
allow_headers=["*"],
)
```
## Error Handling
```python
from fastapi import Request
from fastapi.responses import JSONResponse
@app.exception_handler(ValueError)
async def value_error_handler(request: Request, exc: ValueError):
return JSONResponse(
status_code=400,
content={"detail": str(exc)}
)
class CustomException(Exception):
def __init__(self, name: str):
self.name = name
@app.exception_handler(CustomException)
async def custom_exception_handler(request: Request, exc: CustomException):
return JSONResponse(
status_code=418,
content={"message": f"Oops! {exc.name}"}
)
```
## Background Tasks
```python
from fastapi import BackgroundTasks
def send_email(email: str, message: str):
# Send email logic
pass
@app.post("/send-notification/")
async def send_notification(
email: str,
background_tasks: BackgroundTasks
):
background_tasks.add_task(send_email, email, "notification")
return {"message": "Notification sent in background"}
```
## File Upload
```python
from fastapi import File, UploadFile
@app.post("/upload/")
async def upload_file(file: UploadFile = File(...)):
contents = await file.read()
# Process file
return {"filename": file.filename, "size": len(contents)}
```
## Scripts
- `scripts/skill_info.py`: Print skill name and description.
---
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<!-- tomevault:4.0:skill_md:2026-04-14 -->
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