问FastAPI中的会话

EN

secret_key='cart'

class Cart(object):

    def __init__(self, request,db):

        self.session = request.session
        cart = self.session.get(secret_key)

        if not cart:
            # save an empty cart in the session
            cart = self.session[secret_key] = {}

        self.cart = cart

    def add(self, product, quantity=1, update_quantity=False):

        product_id = str(product.id)
        if product_id not in self.cart:
            self.cart[product_id] = {'quantity': 0,
                                 'price': str(product.price)
                                 }
        if update_quantity:
            self.cart[product_id]['quantity'] = quantity
        else:
            self.cart[product_id]['quantity'] += quantity

@app.post("/add")
def cart_add(request: Request,db: Session = Depends(get_db), id: int=Form(...), quantity: int=Form(...),
         update:bool=Form(...)):
    cart=Cart(request,db)
    product=db.query(models.Product).filter(models.Product.id == id).first()
    cart.add(product=product, quantity=quantity, update_quantity=update)
    return RedirectResponse(url="/cart", status_code=status.HTTP_303_SEE_OTHER)