def update_hero(hero_id: int, hero: HeroUpdate, session: SessionDep):
    hero_db = session.get(Hero, hero_id)
    if not hero_db:
        raise HTTPException(status_code=404, detail="Hero not found")
    hero_data = hero.model_dump(exclude_unset=True)
    hero_db.sqlmodel_update(hero_data)
    session.add(hero_db)
    session.commit()
    session.refresh(hero_db)
    return hero_db


@app.delete("/heroes/{hero_id}")

    name: str
    description: str | None = None
    price: float
    tax: float | None = None


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item):
    item_dict = item.model_dump()
    if item.tax is not None:
        price_with_tax = item.price + item.tax
        item_dict.update({"price_with_tax": price_with_tax})

    price: float
    tax: float | None = None


app = FastAPI()


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item, q: str | None = None):
    result = {"item_id": item_id, **item.model_dump()}
    if q:
        result.update({"q": q})

def fake_password_hasher(raw_password: str):
    return "supersecret" + raw_password


def fake_save_user(user_in: UserIn):
    hashed_password = fake_password_hasher(user_in.password)
    user_in_db = UserInDB(**user_in.model_dump(), hashed_password=hashed_password)
    print("User saved! ..not really")
    return user_in_db


@app.post("/user/", response_model=UserOut)
async def create_user(user_in: UserIn):

        raise HTTPException(status_code=400, detail="Invalid X-Token header")
    if item.id in fake_db:
        raise HTTPException(status_code=409, detail="Item already exists")
    fake_db[item.id] = item.model_dump()

    if exclude is not None and not isinstance(exclude, (set, dict)):
        exclude = set(exclude)  # type: ignore[assignment]  # ty: ignore[unused-ignore-comment]
    if isinstance(obj, BaseModel):
        obj_dict = obj.model_dump(
            mode="json",
            include=include,
            exclude=exclude,
            by_alias=by_alias,
            exclude_unset=exclude_unset,
            exclude_none=exclude_none,

* 📝 Add VS Code tutorial link. PR [#10592](https://github.com/tiangolo/fastapi/pull/10592) by [@nilslindemann](https://github.com/nilslindemann).
* 📝 Add notes about Pydantic v2's new `.model_dump()`. PR [#10929](https://github.com/tiangolo/fastapi/pull/10929) by [@tiangolo](https://github.com/tiangolo).