So, in the documentation for third-party ASGI middlewares they will probably tell you to do something like:

```Python
from unicorn import UnicornMiddleware

app = SomeASGIApp()

new_app = UnicornMiddleware(app, some_config="rainbow")
```

But FastAPI (actually Starlette) provides a simpler way to do it that makes sure that the internal middlewares to handle server errors and custom exception handlers work properly.

    name: str

    if PYDANTIC_V2:
        model_config = ConfigDict(
            json_schema_extra={
                "description": (
                    "response_model_by_alias=False is basically a quick hack, to support "
                    "proper OpenAPI use another model with the correct field names"
                )
            }
        )
    else:

        class Config:
            schema_extra = {

    ```

!!! tip
    请注意，读取用户（从 API 返回）时将使用不包括`password`的`User` Pydantic*模型*。

### 使用 Pydantic 的`orm_mode`

现在，在用于查询的 Pydantic*模型*`Item`中`User`，添加一个内部`Config`类。

此类[`Config`](https://docs.pydantic.dev/latest/api/config/)用于为 Pydantic 提供配置。

在`Config`类中，设置属性`orm_mode = True`。

=== "Python 3.10+"

    ```Python hl_lines="13  17-18  29  34-35"
    {!> ../../../docs_src/sql_databases/sql_app_py310/schemas.py!}

Successfully initialized: docs/ht
```

</div>

Now you can check in your code editor the newly created directory `docs/ht/`.

That command created a file `docs/ht/mkdocs.yml` with a simple config that inherits everything from the `en` version:

```yaml
INHERIT: ../en/mkdocs.yml
```

!!! tip
    You could also simply create that file with those contents manually.

Sebastián Ramírez <******@****.***> 1688749933 +0200

        '"dom_id": "#swagger-ui"' in response.text
    ), "default configs should be preserved"
    assert "presets: [" in response.text, "default configs should be preserved"
    assert (
        "SwaggerUIBundle.presets.apis," in response.text
    ), "default configs should be preserved"
    assert (
        "SwaggerUIBundle.SwaggerUIStandalonePreset" in response.text
    ), "default configs should be preserved"
    assert (

APP_NAME="ChimichangApp"
```

### ✍ ⚒ ⚪️➡️ `.env`

& ⤴️ ℹ 👆 `config.py` ⏮️:

```Python hl_lines="9-10"
{!../../../docs_src/settings/app03/config.py!}
```

📥 👥 ✍ 🎓 `Config` 🔘 👆 Pydantic `Settings` 🎓, & ⚒ `env_file` 📁 ⏮️ 🇨🇻 📁 👥 💚 ⚙️.

!!! tip
     `Config` 🎓 ⚙️ Pydantic 📳. 👆 💪 ✍ 🌖 <a href="https://docs.pydantic.dev/latest/api/config/" class="external-link" target="_blank">Pydantic 🏷 📁</a>

from functools import lru_cache
from typing import Annotated

from fastapi import Depends, FastAPI

from .config import Settings

app = FastAPI()


@lru_cache
def get_settings():
    return Settings()


@app.get("/info")
async def info(settings: Annotated[Settings, Depends(get_settings)]):
    return {
        "app_name": settings.app_name,
        "admin_email": settings.admin_email,

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None

    model_config = {
        "json_schema_extra": {
            "examples": [
                {
                    "name": "Foo",
                    "description": "A very nice Item",
                    "price": 35.4,

from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None

    class Config:
        schema_extra = {
            "examples": [
                {
                    "name": "Foo",
                    "description": "A very nice Item",
                    "price": 35.4,