`BaseUser` verfügt über die Basis-Felder. Dann erbt `UserIn` von `BaseUser` und fügt das Feld `Passwort` hinzu, sodass dass es nun alle Felder beider Modelle hat.

Wir annotieren den Funktionsrückgabetyp als `BaseUser`, geben aber tatsächlich eine `UserIn`-Instanz zurück.

❔ 🔨 👉 👷 ❓ ➡️ ✅ 👈 👅. 👶

### 🆎 ✍ & 🏭

🥇 ➡️ 👀 ❔ 👨‍🎨, ✍ & 🎏 🧰 🔜 👀 👉.

`BaseUser` ✔️ 🧢 🏑. ⤴️ `UserIn` 😖 ⚪️➡️ `BaseUser` & 🚮 `password` 🏑,, ⚫️ 🔜 🔌 🌐 🏑 ⚪️➡️ 👯‍♂️ 🏷.

👥 ✍ 🔢 📨 🆎 `BaseUser`, ✋️ 👥 🤙 🛬 `UserIn` 👐.

👨‍🎨, ✍, & 🎏 🧰 🏆 🚫 😭 🔃 👉 ↩️, ⌨ ⚖, `UserIn` 🏿 `BaseUser`, ❔ ⛓ ⚫️ *☑* 🆎 🕐❔ ⚫️❔ ⌛ 🕳 👈 `BaseUser`.

### FastAPI 💽 🖥

app = FastAPI()


class UserIn(BaseModel):
    username: str
    password: str
    email: EmailStr
    full_name: Union[str, None] = None


class UserOut(BaseModel):
    username: str
    email: EmailStr
    full_name: Union[str, None] = None


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

    ```

### Про `**user_in.dict()`

#### `.dict()` из Pydantic

`user_in` - это Pydantic-модель класса `UserIn`.

У Pydantic-моделей есть метод `.dict()`, который возвращает `dict` с данными модели.

Поэтому, если мы создадим Pydantic-объект `user_in` таким способом:

```Python
user_in = UserIn(username="john", password="secret", email="******@****.***")
```

и затем вызовем:

```Python

### About `**user_in.dict()`

#### Pydantic's `.dict()`

`user_in` is a Pydantic model of class `UserIn`.

Pydantic models have a `.dict()` method that returns a `dict` with the model's data.

So, if we create a Pydantic object `user_in` like:

```Python
user_in = UserIn(username="john", password="secret", email="******@****.***")
```

and then we call:

```Python

    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.dict(), 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):
    user_saved = fake_save_user(user_in)

    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.dict(), 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):
    user_saved = fake_save_user(user_in)

                            "items": {"$ref": "#/components/schemas/ValidationError"},
                        }
                    },
                },
                "UserIn": {
                    "title": "UserIn",
                    "required": ["username", "email", "password"],
                    "type": "object",
                    "properties": {

                            {"title": "Full Name", "type": "string"}
                        ),
                    },
                },
                "UserIn": {
                    "title": "UserIn",
                    "required": ["username", "password", "email"],
                    "type": "object",
                    "properties": {

                            "items": {"$ref": "#/components/schemas/ValidationError"},
                        }
                    },
                },
                "UserIn": {
                    "title": "UserIn",
                    "required": ["username", "email", "password"],
                    "type": "object",
                    "properties": {