All in a way that provided the best development experience for all the developers.

## Requirements

After testing several alternatives, I decided that I was going to use <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">**Pydantic**</a> for its advantages.

Tudo de uma forma que oferecesse a melhor experiência de desenvolvimento para todos os desenvolvedores.

## Requisitos

Após testar várias alternativas, eu decidi que usaria o <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">**Pydantic**</a> por suas vantagens.

To declare a **request** body, you use <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> models with all their power and benefits.

/// info

To send data, you should use one of: `POST` (the more common), `PUT`, `DELETE` or `PATCH`.

Votre API aura presque toujours à envoyer un corps de **réponse**. Mais un client n'a pas toujours à envoyer un corps de **requête**.

Pour déclarer un corps de **requête**, on utilise les modèles de <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> en profitant de tous leurs avantages et fonctionnalités.

/// info

Pour envoyer de la donnée, vous devriez utiliser : `POST` (le plus populaire), `PUT`, `DELETE` ou `PATCH`.

为此，请使用 Python 标准类型提示 <a href="https://docs.python.org/3/library/typing.html#typing.Union" class="external-link" target="_blank">`typing.Union`</a>：

/// note | "笔记"

定义 <a href="https://docs.pydantic.dev/latest/concepts/types/#unions" class="external-link" target="_blank">`Union`</a> 类型时，要把详细的类型写在前面，然后是不太详细的类型。下例中，更详细的 `PlaneItem` 位于 `Union[PlaneItem，CarItem]` 中的 `CarItem` 之前。

///

//// tab | Python 3.10+

# 📣 📨 🖼 💽

👆 💪 📣 🖼 💽 👆 📱 💪 📨.

📥 📚 🌌 ⚫️.

## Pydantic `schema_extra`

👆 💪 📣 `example` Pydantic 🏷 ⚙️ `Config` &amp; `schema_extra`, 🔬 <a href="https://docs.pydantic.dev/latest/concepts/json_schema/#customizing-json-schema" class="external-link" target="_blank">Pydantic 🩺: 🔗 🛃</a>:

//// tab | 🐍 3️⃣.6️⃣ &amp; 🔛

```Python hl_lines="15-23"
{!> ../../docs_src/schema_extra_example/tutorial001.py!}
```

////

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    avatarUrl: https://avatars.githubusercontent.com/u/33217836?v=4
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      "loc": [
        "path",
        "item_id"
      ],
      "msg": "Input should be a valid integer, unable to parse string as an integer",
      "input": "foo",
      "url": "https://errors.pydantic.dev/2.1/v/int_parsing"
    }
  ]
}
```

Der Pfad-Parameter `item_id` hatte den Wert `"foo"`, was kein `int` ist.

Você tem que deixá-lo ativo por um tempo, já que existem clientes o utilizando. Mas você quer que a documentação deixe claro que este parâmetro será <abbr title="obsoleto, recomenda-se que não deve ser utilizado">descontinuado</abbr>.

Então você passa o parâmetro `deprecated=True` para `Query`:

```Python hl_lines="18"
{!../../docs_src/query_params_str_validations/tutorial010.py!}
```

Lưu ý rằng, điều này có nghĩa rằng "`one_person`" là một **thực thể** của lớp `Person`.

Nó không có nghĩa "`one_person`" là một **lớp** gọi là `Person`.

## Pydantic models

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> là một thư viện Python để validate dữ liệu hiệu năng cao.

Bạn có thể khai báo "hình dạng" của dữa liệu như là các lớp với các thuộc tính.