fastapi

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from typing import List
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from fastapi import Depends, FastAPI, HTTPException, Request, Response
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from sqlalchemy.orm import Session
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from . import crud, models, schemas
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from .database import SessionLocal, engine
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models.Base.metadata.create_all(bind=engine)
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app = FastAPI()
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@app.middleware("http")
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async def db_session_middleware(request: Request, call_next):
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    response = Response("Internal server error", status_code=500)
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    try:
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        request.state.db = SessionLocal()
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        response = await call_next(request)
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    finally:
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        request.state.db.close()
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    return response
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# Dependency
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def get_db(request: Request):
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    return request.state.db
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@app.post("/users/", response_model=schemas.User)
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def create_user(user: schemas.UserCreate, db: Session = Depends(get_db)):
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    db_user = crud.get_user_by_email(db, email=user.email)
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    if db_user:
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        raise HTTPException(status_code=400, detail="Email already registered")
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    return crud.create_user(db=db, user=user)
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@app.get("/users/", response_model=List[schemas.User])
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def read_users(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
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    users = crud.get_users(db, skip=skip, limit=limit)
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    return users
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@app.get("/users/{user_id}", response_model=schemas.User)
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def read_user(user_id: int, db: Session = Depends(get_db)):
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    db_user = crud.get_user(db, user_id=user_id)
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    if db_user is None:
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        raise HTTPException(status_code=404, detail="User not found")
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    return db_user
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@app.post("/users/{user_id}/items/", response_model=schemas.Item)
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def create_item_for_user(
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    user_id: int, item: schemas.ItemCreate, db: Session = Depends(get_db)
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):
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    return crud.create_user_item(db=db, item=item, user_id=user_id)
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@app.get("/items/", response_model=List[schemas.Item])
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def read_items(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
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    items = crud.get_items(db, skip=skip, limit=limit)
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    return items
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